Current Fellows



David S. Fink

David FinkDavid Fink, MPH, MPhil is A SAETP pre-doctoral fellow and PhD candidate in Epidemiology at Mailman School of Public Health. He is interested in the influence of social arrangements and interactions on population health.  He is a social epidemiologist who has worked extensively with various branches of the military (i.e., US Army, Navy, Marine Corp, National Guard and Reserves) to investigate the psychological sequela of combat using a life course perspective.  His primary focus is on (i) the etiology of mental disorders, particularly substance use disorders; (ii) the extension of quantitative methods to estimate the health effects of policies and programs with a goal of (iii) improving population health through evidence-based policy.  He is the past president of the Society for Epidemiological Research Student Postdoc Committee. David has published over 40 articles, half of which were first-authored, and 4 book chapters.

Selected Publications

  • Fink DS, Schleimer JP, Sarvet A, Grover KK, Delcher C, Kim JH, Castillo-Carniglia A, Rivera-Aguirre, AE, Henry SG, Martins SS, Cerdá M. Association Between Prescription Drug Monitoring Programs and Nonfatal and Fatal Drug Overdoses: A Systematic Review. Annals of Internal Medicine. 2018; 168(11):783-790.
  • Fink DS, Santaella-Tenorio J, Keyes KM. Celebrity Suicide and News Media: Increase in Suicides the Months After the Death of Robin Williams in the U.S. PLoS One. 2018; 13(2): e0191405. doi:10.1371/journal.pone.0191405.
  • Fink, D. S., Keyes, K. M., Calabrese, J. R., Liberzon, I., Tamburrino, M. B., Cohen, G. H., ...Galea S. (2017). Deployment and Alcohol Use in a Military Cohort: Use of Combined Methods to Account for Exposure-Related Covariates and Heterogeneous Response to Exposure. American Journal of Epidemiology, 186(4), 411-419.
  • Fink, D. S., & Galea S. (2015). Life course epidemiology of trauma and related psychopathology. Current Psychiatric Reports, 17(5), 566.

Erik S. Jorgenson

Erik JorgensonErik S. Jorgenson, MPH, is a SAETP pre-doctoral fellow in the MSPH Department of Epidemiology. His research primarily focuses on the intersections of violence and health, and his current work involves investigating trends in adolescent opioid use to advance scientific understanding of the drugs-violence connection in American youth. A point of emphasis in his work is the use of “big data” in service of evidence-based policy and practice. His prior research leverages a range of national surveillance systems including vital statistics, crime reports, and survey data to answer fundamental questions about firearm use, injury offending and victimization, and youth and intimate partner homicide. His prior work includes countermeasures to reduce household injuries and minority health disparities in treatment access and utilization. Erik received a BS in Community Health from the University of Maryland, College Park, School of Public Health and a MPH from the University of Pennsylvania, Perelman School of Medicine.

Selected Publications

  • Jorgenson ES, Richardson DM, Thomasson AM, Nelson CL, Ibrahim SA. (2015). Race, rehabilitation, and 30-day Readmission after Elective Total Knee Arthroplasty. Geriatric Orthopedic Surgery and Rehabilitation, 6(4), 313-310.
  • Baker JF, Leonard MB, Long J, Mostoufi-Moab S, Denburg M, Jorgenson ES, Sharma P, Zemel B, Taratuta EG, Ibrahim SA. (in press). Muscle deficits in rheumatoid arthritis contribute to inferior cortical bone structure and trabecular bone mineral density. The Journal of Rheumatology.
  • Baker JF, Sauer BC, Cannon GW, Teng CC, Michaud K, Ibrahim SA, Jorgenson ES, Davis L, Caplan L, Mikuls TR. (2016). Changes in body mass related to the initiation of disease-modifying therapies in rheumatoid arthritis. Arthritis & Rheumatology, 68(8), 1818-27.

Shadiya L. Moss

Shadiya MossShadiya L. Moss, MPH, is a SAETP pre-doctoral fellow in the MSPH Department of Epidemiology, where she was formerly an IMSD fellow. She is interested in substance abuse and psychiatric epidemiology, with a specific interest in marijuana use, depression, anxiety, and bipolar disorder among racial/ethnic minorities. Shadiya has worked as a researcher in the field of psychiatry for over seven years with the aim of improving the quality of life of individuals with mental illness. While at Columbia, she plans to expand on her prior research experience and focus on (1) improving the implementation and dissemination of interventions designed to treat substance use, mood, and anxiety disorders among racial/ethnic minorities and (2) reducing symptomatology in these populations by addressing the social, cultural and environmental factors impacting their treatment seeking behaviors and adherence to available treatment options. Shadiya is also interested in discovering novel ways to recruit and integrate racial/ethnic minorities into epidemiologic studies, in which they are consistently underrepresented. Prior to her doctoral training, she obtained a BA from Drexel University and a MPH from the University of Pennsylvania.

Selected Publications

  • Moss SL, Santaella-Tenorio J, Mauro PM, Keyes KM, Martins SS. Prevalence and association of marijuana use with deviant behavior and preference for risky behaviors among adolescents from 2002 to 2014. Addiction. In press.
  • Dean LT, Moss SL*, Rollinson SI, Jaramillo LF, Paxton RJ, Owczarak JT. Patient recommendations for reducing long-lasting economic burden after breast cancer. Cancer. In press. (*Dean LT and Moss SL are co-first authors)
  • Dean LT, Moss SL, Ransome Y, Frasso-Jaramillo L, Zhang Y, Visvanathan K, Nicholas LH, Schmitz KH. “It Still Affects Our Economic Situation": A Mixed Methods Analysis of Long-Term Economic Burden due to Breast Cancer and Lymphedema among Breast Cancer Survivors in the United States. Journal of Supportive Care in Cancer. In press.
  • Dean LT & Moss SL*, McCarthy AM, Armstrong KA. Healthcare system distrust, physician trust, and patient discordance with adjuvant breast cancer treatment recommendations.Cancer Epidemiol Biomarkers Prev.  2017;26(12):1745-1752. (*Dean LT and Moss SL are co-first authors)
  • Eyrich-Garg KM, Moss SL. How feasible is multiple time point web-based data collection with individuals experiencing street homelessness? Journal of Urban Health. 2017 Feb 1;94(1):64-74.

Alexander S. Perlmutter

Alexander PerlmutterAlexander S. Perlmutter, MPH, is a SAETP pre-doctoral fellow in the MSPH Department of Epidemiology. His research interests include methodological issues vis-à-vis addiction studies and the social determinants and consequences of addictive behaviors. He has worked with national data sets to measure relationships between prescription opioid use, employment, and age over time, how medical marijuana law enactments are related to knowledge of said laws, and how race modifies the relationship between marijuana use and arrest over time. He completed his MPH in the MSPH Department of Epidemiology in 2016. Alex has also worked in the Centre de Recherche d’Épidemiologie et Statistique Sorbonne Paris Cité, where he studied methodological problems in conducting health research. His projects there range from assessing primary outcome modifications in oncology clinical trials to evaluating the evidence base of mobile applications meant to curb substance use problems.

Selected Publications

  • Perlmutter, A. S., Tran, V. T., Dechartres, A., & Ravaud, P. (2017). Statistical controversies in clinical research: comparison of primary outcomes in protocols, public clinical-trial registries and publications: the example of oncology trials. Ann Oncol, 28(4), 688-695.
  • Perlmutter, A. S., Conner, S. C., Savone, M., Kim, J. H., Segura, L. E., & Martins, S. S. (2017). Is employment status in adults over 25 years old associated with nonmedical prescription opioid and stimulant use? Social Psychiatry and Psychiatric Epidemiology, 52(3), 291-298.
  • Martins, S. S., Segura, L. E., Santaella-Tenorio, J., Perlmutter, A., Fenton, M. C., Cerda, M., . . . Hasin, D. S. (2017). Prescription opioid use disorder and heroin use among 12-34 year-olds in the United States from 2002 to 2014. Addict Behav, 65, 236-241.
  • Perlmutter A.S., Segura L.S., Santaella-Tenorio J., Mauro P.M., Mauro C.M., Martins S.S.. (June 2017). Is the increased prevalence of arrest comparing marijuana users to non-users different by race/ethnicity over time? Submitted for publication. Poster presentation at the annual conference of the College on Problems of Drug Dependence, Montreal, Canada.


Nicholas Vivio, MS, is a SAETP pre-doctoral fellow in the MSPH Department of Epidemiology. Nick is interested in comorbid psychiatric and substance use disorders, particularly among underserved populations both in the U.S. and Latin America. His interests range from the impact of substance abuse and depressive episodes on telomere length and the epigenome to developing new interventions that ameliorate quality of life among those with severe mental health and substance use disorders. In addition, he is keenly interested in the role that chronic stress and discrimination play in comorbid psychiatric and substance use outcomes (e.g. Latin American immigrants). Nick has a B.A. in Economics, M.S. Global Affairs, and a Post-Baccalaureate in Premedical Studies from Washington University in St. Louis. He spent several years working in the departments of neurosurgery and psychiatry at Washington University in St. Louis and nearly three years working as a Senior Research Coordinator in the Rehabilitation Robotics R&D Lab at the University of Pennsylvania. There he worked on the development of affordable, low-cost robotics for stroke survivors and children with cerebral palsy, both in the U.S. and in various LMICS.

Selected Publications

  • Vivio N, Carliner H, Adams C, Alegria M, Canino G, Duarte C. Socioeconomic Status and Tobacco Use in Young Adulthood: Findings among Puerto Ricans in two contexts. Poster presentation at the 2019 annual conference of the American Psychopathological Association.
  • Vivio, N and Mascayano, F.  Pilot Randomized Controlled Trial (RCT) of a Recovery-Oriented Intervention in Chile Aimed at Addressing Self-Stigma. Short oral communication presentation at the 2018 annual conference of the 18th World Psychiatric Association, World Congress of Psychiatry. 
  • Mascayano, F., Vivio, N., Tapia, T., and Susser, E. Addressing Stigma Towards People with Severe Mental Illness in Chile. Poster presentation at the 2018 World Psychiatric Association, Epidemiology and Public Health Section.  
  • Sefcik, J., Johnson, M., Yim, M., Lau, T., Dieckemeyer, E., Vivio, N., Swift-Spong, K., Cacchione, P. Older Adults and Clinicians Guiding the Design of a Low-Cost Assistive Mobile Robot. Poste presentation at the Annual Scientific Meeting of the Gerontological Society of America.
  • Brown, J, Vivio N, Sheean G. (2012). The Clinical Practice of Reconstructive Neurosurgery. Clinical Neurology and Neurosurgery, 114(5), 506-514.  


Elizabeth D. Nesoff

Elizabeth NesoffElizabeth D. Nesoff, PhD MPH CHES, is a SAETP post-doctoral research fellow in the MSPH Department of Epidemiology. She is a public health researcher focused on the intersection of substance use, the neighborhood environment, injury prevention, and health disparities. Her current research uses spatial analysis methods to investigate the relationship between modifiable neighborhood features and opioid overdose risk. She holds a PhD from the Department of Health, Behavior, and Society at the Johns Hopkins Bloomberg School of Public Health. Her dissertation research focused on the impact of the alcohol environment on pedestrian injury risk, and was supported by a Ruth L. Kirschstein National Research Service Award from the National Institute on Alcohol Abuse and Alcoholism. Prior to completing her doctoral training, Dr. Nesoff worked at the Centers for Disease Control and Prevention as a research fellow with the Division for Heart Disease and Stroke Prevention and as a health communication fellow in the National Center for HIV/AIDS, Viral Hepatitis, STD and TB Prevention. Dr. Nesoff earned an MPH from the Emory University Rollins School of Public Health, and a BA from Wellesley College.

Selected Publications

  • Nesoff ED, Milam AJ, Branas CC, Martins SS,…Furr-Holden CDM. (2018). Alcohol Outlets, Neighborhood Retail Environments, and Pedestrian Injury Risk. Alcoholism: Clinical and Experimental Research. doi: 10.1111/acer.13844
  • Nesoff ED, Milam AJ, Pollack KM,…, Furr-Holden CDM. (2018) The Neighbourhood Alcohol Environment and Injury Risk: A Spatial Analysis of Pedestrian Injury in Baltimore City. Injury Prevention. doi: 10.1136/injuryprev-2018-042736
  • Furr-Holden CDM, Nesoff ED, Nelson V, et al. (2018). Understanding the Relationship between Alcohol Outlet Density and Life Expectancy in Baltimore City: The Role of Community Violence and Community Disadvantage. Journal of Community Psychology. doi: 10.1002/jcop.22099
  • Nesoff ED, Branas CC, Martins SS. (In press). Challenges in Studying Statewide Pedestrian Injuries and Drug Involvement. Injury Epidemiology
  • Nesoff ED, Milam AJ, Bone L,…, Furr-Holden CDM. (2017) Tobacco Policies and On-Premise Smoking in Bars and Clubs that Cater to Young African Americans following the Maryland Clean Indoor Air Act of 2007. Journal of Ethnicity in Substance Abuse, 16(3): 328-343.

Hillary Samples

Hillary Samples, PhD MHS, is a SAETP post-doctoral research fellow in the MSPH Department of Epidemiology. She has worked with national data and large health care databases to identify risk factors for substance use problems, analyze patterns of prevention and treatment services, and evaluate the impact of policies by assessing trends in services and outcomes. Her current projects examine the clinical epidemiology of opioid-related problems and treatment, including studies of adverse opioid-related outcomes and patterns of medication treatment for opioid addiction among Medicaid enrollees. Dr. Samples earned her PhD in Health Services Research and Policy from the Department of Health Policy and Management and her MHS from the Department of Mental Health at the Johns Hopkins Bloomberg School of Public Health. Prior to completing her graduate training, she earned her BA in Psychology from the University of Virginia and worked as a clinical research coordinator and psychometrist at the University of Virginia Health System.

Selected Publications

  • Samples H, Williams AR, Olfson M, Crystal S. (2018). Risk Factors for Discontinuation of Buprenorphine Treatment for Opioid Use Disorders in a Multi-State Sample of Medicaid Enrollees. Journal of Substance Abuse Treatment, 95, 9-17.
  • Samples H, Bandara SN, Olfson M, Saloner B (2018). Tobacco Screening and Counseling for Smokers with Mental Health and Substance Use Problems in the United States. American Journal of Preventive Medicine, 55(4), 524-532.
  • Bandara S, Samples H, Crum R, Saloner B. (2018). Is Screening and Intervention Associated with Treatment Receipt Among Individuals with Alcohol Use Disorder? Evidence from a National Survey. Journal of Substance Abuse Treatment, 92, 85-90.
  • McGinty, E., Samples, H., Bandara, S., Saloner, B., Bachhuber, M., & Barry, C. (2016). The Emerging Public Discourse on State Legalization of Marijuana for Recreational Use in the US: Analysis of News Media Coverage, 2010-2014. Preventive Medicine, 90, 114-120.

Justin Knox

Justin Knox, PhD MPH MSc, is a SAETP post-doctoral research fellow in the MSPH Department of Epidemiology. He is an epidemiologist whose research focuses on substance use and infectious diseases. His current projects examine the health benefits of drinking reductions among the US general population, as well as intervention research aimed at HIV treatment and prevention adherence. Dr. Knox earned his PhD in Epidemiology from MSPH. His dissertation research was on substance use and HIV risk among social networks of black South African men who have sex with men, and was supported by a Ruth L. Kirschstein National Research Service Award from the National Institute on Drug Abuse and the U.S. Fulbright Student Program. Dr. Knox has an MPH from MPSH, an MSc in Medical Anthropology from University College London and a BA from Middlebury College. He also served as a Peace Corps volunteer in Swaziland.

Selected Publications

  • Knox J, Wall M, Witkiewitz K, Kranzler HR, Falk D, Litten R, Mann R, O’Malley SS, Scodes J, Anton R, Hasin DS. Reduction in non-abstinent WHO drinking risk levels and change in risk for liver disease and positive AUDIT-C scores: prospective 3-year follow-up results in the US general population (2018). Alcoholism: Clinical & Experimental Research, 42(11):2256-2265.
  • Knox J, Reddy V, Lane T, Lovasi G, Hasin D, Sandfort T. (2017) Determinants of hazardous drinking among black South African men who have sex with men. Drug and Alcohol Dependence. 180: 14-21. 
  • Knox J, Reddy V, Lane T, Hasin D, Sandfort T. (2017) Substance use and sexual risk behavior among black South African men who have sex with men: the moderating effects of reasons for drinking and safer sex intentions. AIDS & Behavior. 21: 2023-2032.  
  • Knox J, Sullivan S, Urena J, Miller M, Vavagiakis P, Shi Q, Uhlemann AC, Lowy FD. (2016) Environmental contamination in the home and risk of recurrent community-associated Methicillin-resistant Staphylococcus aureus infection. JAMA Internal Medicine. 176: 807-815. 
  • Knox J, Uhlemann AC, Lowy FD. (2015) Staphylococcus aureus infections: transmission within households and the community. Trends in Microbiology. 23: 437-444. 
  • Knox J, Reddy V, Kaighobadi F, Nel D, Sandfort T. (2013) Communicating HIV status in sexual interactions: assessing social cognitive constructs, situational factors, and individual characteristics among South African MSM. AIDS & Behavior, 17: 350-359. 

Jose E. Diaz

José E. Diaz, PhD, is a SAETP post-doctoral research fellow in the MSPH Department of Epidemiology. He is interested in examining how larger social and political contexts (e.g., public health policies, neighborhood environments) contribute to sexual minority health disparities. In particular, he is interested in utilizing national data to deepening our understanding of the substance use disparities that exist among sexual minority populations. He completed his doctoral studies in sociomedical sciences with a concentration in psychology at Columbia University in February of 2018. His dissertation work explored how cultural (e.g., acculturation), neighborhood (e.g., ethnic density), and syndemic factors (e.g., substance use) contribute to HIV-related risk among Latino men who have sex with men (MSM). His dissertation work was nominated for the Marisa de Castro Benton Dissertation Award in Sociomedical Sciences for its outstanding contribution to the field. Prior to his doctoral training, Dr. Diaz taught high school English in Spain through a model United Nations curriculum focused on population health and inequalit

Selected Publications

  • Diaz, J.E., Schrimshaw, E.W., Tieu, H.V., Nandi, V., Koblin, B., & Frye, V. (under review). Acculturation as a moderator of HIV risk behavior correlates among Latino men who have sex with men. 
  • Diaz, J.E., Schrimshaw, E.W., Koblin, B., Tieu, H.V., Nandi, V., & Frye, V. Syndemic factors associated with sexual risk behavior among Latino men who have sex with men: The moderating role of outness. Paper presented at the American Public Health Association 146th Annual Meeting and Exposition, San Diego, CA.
  • Diaz, J.E., Schrimshaw, E.W., Nandi, V., Koblin, B., Tieu, H.V., & Frye, V.  Ethnicity- and gay-related neighborhood-level correlates of HIV risk behavior among Latino men who have sex with men. Poster presented at the American Public Health Association 146th Annual Meeting and Exposition, San Diego, CA.
  • Martins, M., Diaz, J.E., Valiño, R., Kwate, N.O., & Abraido-Lanza, A. (2014). Havens of risks or resources? A study of two Latino neighborhoods in New York City. J Urban Health91(3), 477-88.


Marine Azevedo Da Silva, PhD, is a SAETP-affiliated post-doctoral research fellow in the MSPH Department of Epidemiology, supported by the NIDA-Inserm Drug Abuse Research Fellowship. She is a social epidemiologist whose current research focuses on studying the impact of policies and social environments on adolescent substance use, substance use disorders and mental health. Prior to her SAETP affiliation, she worked in the Social Epidemiology research team at the Pierre Louis Institute of Epidemiology and Public Health (France) as a postdoctoral researcher, investigating the relationship between occupational status throughout the career, psychosocial work factors and suicide risk. Dr. Azevedo Da Silva earned her PhD in Public Health with a specialization in Epidemiology from the University of Paris-Saclay (French National Institute of Health and Medical Research - Centre for Research in Epidemiology and Population Health, France). Her dissertation research focused on the impact of the antidepressant medication use on cardiometabolic risk, and was supported by a fellowship from the Doctoral School of Public Health (EDPS, France). She earned her MPH from the Paris-Sud University and her BS in Life Sciences from the Paris Descartes University in France.

Selected Publications

  • Azevedo Da Silva M, Younès N, Leroyer A, Plancke L, Lemogne C, Goldberg M, Rivière M, Melchior M. Long-term occupational trajectories and suicide: a 22-year follow-up of the GAZEL cohort study. Scand J Work Environ Health. Scand J Work Environ Health. 2018 Sep 16. pii: 3767. doi: 10.5271/sjweh.3767
  • Younès N, Rivière M, Plancke L, Leroyer A, Blanchon T, Azevedo Da Silva M, Melchior M. Work intensity in men and work-related emotional demands in women are associated with increased suicidality among persons attending primary care. J Affect Disord. 2018 Aug 1;235:565-573. doi: 10.1016/j.jad.2018.04.075
  • Azevedo Da Silva M, Balkau B, Roussel R, Tichet J, Fumeron F, Fagherazzi G, Nabi H, and the D.E.S.I.R. Study Group. Longitudinal association of antidepressant medication use with metabolic syndrome: Results of a 9-year follow-up of the D.E.S.I.R. cohort study. Psychoneuroendocrinology. 2016 Aug 21;74:34-45.
  • Azevedo Da Silva M, Dugravot A, Balkau B, Roussel R, Fumeron F, Elbaz A, Canonico M, Singh-Manoux A, Nabi H, and the D.E.S.I.R. Study Group. Antidepressant medication use and trajectories of fasting plasma glucose, glycated hemoglobin, β-cell function and insulin sensitivity: a 9-year longitudinal study of the D.E.S.I.R. cohort. Int J Epidemiology. 2015 Dec;44(6):1927-40.
  • Azevedo Da Silva M, Lemogne C, Melchior M, Zins M, Van Der Waerden J, Consoli SM, Goldberg M, Elbaz A, Singh-Manoux A, Nabi H. Excess non-psychiatric hospitalizations among employees with mental disorders: a 10-year prospective study of the GAZEL cohort. Acta Psychiatr Scand. 2015 Apr;131(4):307-17.