Amber M. Hall, PhD (she/her) is an environmental epidemiologist, with a strong interest in understanding how exposure to endocrine disrupting chemicals and toxic metals impacts childhood and adolescent health. Her research utilizes prospective cohort studies such as the MIREC and HOME Studies that contain prenatal maternal biospecimens and follow-up on children through childhood or adolescence. Dr. Hall’s research applies both traditional and mixture-based approaches to understand exposure independently and in the context of mixtures, mainly in relation to joint effects.

To date she has published over 30 peer-reviewed publications as well as co-authored a community health status assessment. She completed her PhD in Epidemiology from the University of North Carolina at Chapel Hill in 2022 and her MPH from East Tennessee State University in Public Health.

Alexandria “Alex” Macmadu, PhD (she/her) is a Presidential Postdoctoral Research Associate in the Department of Epidemiology, and she is a member of the People, Place and Health Collective (PPHC) at Brown University.

Dr. Macmadu is a substance use epidemiologist, and her program of research: (1) examines the social determinants of opioid use, opioid use disorder, and overdose; (2) investigates evidence-based approaches to mitigate drug-related harms; and (3) advances justice and health equity in marginalized subgroups, including BIPOC communities, people who use drugs, and persons affected by the criminal legal system.

To date, Dr. Macmadu has authored or co-authored over 30 peer-reviewed publications and one book chapter; several of these works have been published in leading journals, including first-authored publications in The Lancet Public Health, JAMA Network Open, American Journal of Public Health, Addiction, and the International Journal of Drug Policy, and one co-authored manuscript in The Lancet.

Dr. St Fleur’s research interest is in the use of person-centered methods to examine how psycho-behavioral and social determinants of cardiometabolic disease cluster. She is also interested in the application of causal mediation models to investigate the biological pathways linking those clusters to health disparities. She has been working with Dr. Alison Field to empirically derive obesity subtypes in children and adolescents using latent class analysis and assess whether the phenotypes identified are predictive of weight change during adulthood, risk of developing hypertension before age 35, or have a differential pattern of association with the obesity loci.