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Associate Faculty

Shoshana H. Ballew

Shoshana H. Ballew

Research Interests: Cardiovascular Disease and Hypertension, Kidney Disease, Aging
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle

Dr. Ballew received her PhD in Gerontology from the University of Maryland, Baltimore in 2012 and over the past 10 years, has been involved in the administrative and analytic aspects of multiple research studies, ranging from sleep research to kidney disease to the health and well-being of older adults and caregivers. She is a Research Associate in the Department of Epidemiology, the Assistant Project Director for the Chronic Kidney Disease Prognosis Consortium, and the Assistant Program Director for the Cardiovascular Disease Epidemiology Training grant program.

Sara Bleich, PhD

Sara Bleich, PhD

Research Interests: Diabetes Mellitus and Obesity
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Health Disparities and Social Determinants of Health

My research uses rigorous empirical methods to build evidence to support policy alternatives for obesity prevention and control, particularly among disadvantaged populations. Dr. Bleich received her BA in Psychology from Columbia University and her PhD in Health Policy from Harvard University.

Romsai Tony Boonyasai

Romsai Tony Boonyasai

Research Interests: Cardiovascular Disease and Hypertension, chronic illness
Crosscutting Themes and Other Domains: Community Based Participatory Research, Health Disparities and Social Determinants of Health, Hospitals and Health Systems; Implementation Science

I am a internist, health services researcher and implementation scientist. I develop health system strategies for treating chronic disease at the intersection of communities, primary care and hospitals.

Jeanne Charleston

Jeanne Charleston

Research Interests: Cardiovascular Disease and Hypertension, Diabetes Mellitus and Obesity, Kidney Disease, Health Disparties
Crosscutting Themes and Other Domains: Community Based Participatory Research, Health Behaviors and Lifestyle, Health Disparities and Social Determinants of Health

I have played a key role in the conduct of several landmark trials. My expertise has been recognized nationally and internationally as I have served as a consultant to the NIH to assist in enhancing the recruitment of minority and other participants to trials. I also started a 501c3 non-profit, Health Freedom, Inc. offers an inspirational program that brings the community together to raise awareness of the importance of physical activity in the prevention and treatment of cardiovascular disease and cancer.I have offered CVD risk reduction to the community – organizing and running community interventions in minority / underserved communities, developing care guidelines and interacting with the spectrum of health care workers – physicians, nurses and community health advocates.

Janelle W. Coughlin, PhD

Janelle W. Coughlin, PhD

Research Interests: Diabetes Mellitus and Obesity, Mental Illness and Substance Abuse, eating disorders
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Women's Health

Janelle W. Coughlin, Ph.D., is a licensed psychologist, Assistant Professor of Psychiatry and Behavioral Sciences, Director of Obesity Behavioral Medicine, Associate Director of the Center for Behavior and Health, and Associate Faculty for the Welch Center for Prevention, Epidemiology and Clinical Research at Johns Hopkins. She has been an investigator for a number of NIH-funded obesity trials, and her work in obesity includes development and oversight of in-person, telephonic, and internet-based behavioral lifestyle interventions, behavioral management of bariatric surgery patients, and treatment of eating disorders, particularly binge eating disorder.

Jennifer A. Deal

Jennifer A. Deal

Research Interests: Cardiovascular Disease and Hypertension, Diabetes Mellitus and Obesity, Hearing Dysfunction, Cognitive decline and dementia; Aging
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Health Disparities and Social Determinants of Health

Jennifer A. Deal is an Assistant Scientist in the Departments of Epidemiology and Otolaryngology-Head and Neck Surgery, Johns Hopkins University, and Director of Graduate Studies for the Department of Epidemiology. Trained in the epidemiology of aging, Dr. Deal studies how hearing impairment and vascular factors and markers influence cognitive function in order to inform strategies for the prevention of cognitive decline and dementia in older adults.

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Patti L. Ephraim, MPH

Research Interests: Cardiovascular Disease and Hypertension, Diabetes Mellitus and Obesity, Kidney Disease
Crosscutting Themes and Other Domains: Community Based Participatory Research, Health Behaviors and Lifestyle, Health Disparities and Social Determinants of Health, Health Services Rewsearch and Patient Provider Communication, Epidemiology

I have 20 years of experience in the development and execution of multi-site randomized clinical trials. My research has focused on behavioral interventions aimed at improving the health of patients with chronic disease and disability, with particular emphasis on increasing knowledge and self-efficacy, reducing barriers, and improving shared-decision making.

Arlene Taylor Dalcin

Arlene Taylor Dalcin

Research Interests: Cancer, Cardiovascular Disease and Hypertension, Diabetes Mellitus and Obesity, Mental Illness and Substance Abuse
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Health Disparities and Social Determinants of Health, Motivational Interviewing

As a research nutritionist, I am extremely interested in tailoring and testing practical, patient-oriented strategies to assist a variety of population groups in their efforts to accomplish dietary change and prevent and treat obesity. I am passionate about training health practitioners in Motivational Interviewing as a preferred method of health education and communication.

Tariq Shafi

Tariq Shafi

Research Interests: Kidney Disease
Crosscutting Themes and Other Domains: Health Services Rewsearch and Patient Provider Communication, Metabolomics and Genetics

Dr. Shafi's research focuses on causes and prevention of cardiovascular disease in dialysis patients.

A. Richey Sharrett

Allan Gelber

Research Interests: Arthritis,Gout,Rheumatology
Crosscutting Themes and Other Domains: Community Based Participatory Research, Health Disparities and Social Determinants of Health, Health Services Rewsearch and Patient Provider Communication

Dr. Allan Gelber is Professor of Medicine and Deputy Director for Education and Faculty Development in the Division of Rheumatology. Dr. Gelber’s investigative interests focus on clinical epidemiology applied across the spectrum of rheumatic disorders

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Alden L. Gross

Research Interests: Mental Illness and Substance Abuse
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle

I am a psychiatric epidemiologist with a substantive research interests in cognitive aging and mental health. I have a strong methodological background, with an interest in statistical methods relevant to mental health and experience with primary data collection, secondary data analysis, and tools for psychometric measurement. My substantive areas of research revolve around cognition and everyday function among older adults, and the application of latent variable modeling techniques in gerontology. I have published substantive and methodological research in cognitive aging using experimental psychological, neuropsychological, psychometric, and epidemiological perspectives. My career goals are to (1) practice and disseminate epidemiologic and statistical methods that advance gerontology research and (2) translate epidemiological findings into meaningful public health applications.

Marc K. Halushka

Marc K. Halushka

Research Interests: Cardiovascular Disease and Hypertension
Crosscutting Themes and Other Domains: Metabolomics and Genetics

Marc Halushka is a cardiovascular pathologist who has interests in all manner of cardiovascular disease.

Bernard G. Jaar

Bernard G. Jaar

Research Interests: Cardiovascular Disease and Hypertension, Kidney Disease
Crosscutting Themes and Other Domains: Environmental Health, Health Services Rewsearch and Patient Provider Communication

I'm a nephrologist with extensive training in clinical epidemiology. My research interests include screening for CKD, outcome studies in ESRD, peripheral arterial disease in the CKD population.

Rita Rastogi Kalyani, MD, MHS

Rita Rastogi Kalyani, MD, MHS

Research Interests: Diabetes Mellitus and Obesity
Crosscutting Themes and Other Domains: Women's Health

Dr. Kalyani's research focuses on diabetes and aging, specifically accelerated muscle loss, disability and frailty in persons with diabetes. She is also interested in sex differences in diabetes-related complications and physical functioning in other endocrine diseases.

Frank R. Lin

Frank R. Lin

Research Interests: Hearing Dysfunction, Cognitive aging and dementia
Crosscutting Themes and Other Domains: Community Based Participatory Research, Health Disparities and Social Determinants of Health

Frank R. Lin is an Associate Professor of Otolaryngology, Geriatrics, Mental Health, and Epidemiology at Johns Hopkins. Dr. Lin’s clinical practice is dedicated to the medical and surgical management of otologic conditions, and his research is focused on studying questions at the interface of hearing loss, gerontology, and public health.

Mara McAdams-DeMarco

Mara McAdams-DeMarco

Research Interests: Kidney Disease
Crosscutting Themes and Other Domains: Frailty

My research interests include: 1) the epidemiology of aging among ESRD patients, 2) pharmacoepidemiology among older adults with ESRD as well as 3) arthritis and aging.

Seth Shay Martin

Seth Shay Martin

Research Interests: Cardiovascular Disease and Hypertension
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Health Services Rewsearch and Patient Provider Communication

Dr. Martin has a longstanding interest in preventive cardiology, in particular cardiovascular risk assessment, lipidology, and mobile health technology.

J. William (Bill) McEvoy

J. William ("Bill") McEvoy

Research Interests: Cardiovascular Disease and Hypertension
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Biomarkers

Dr. John William ("Bill") McEvoy is an Assistant Professor of Medicine in the Division of Cardiology and Department of Medicine at the Johns Hopkins University School of Medicine. His research activities focus on refining and personalizing cardiovascular risk, testing novel biomarkers of risk, and also on comparative effectiveness research; all with a special emphasis on hypertension and atherosclerosis.

Noel Mueller

Noel Mueller

Research Interests: Cardiovascular Disease and Hypertension, Diabetes Mellitus and Obesity
Crosscutting Themes and Other Domains: Women's Health, Microbiome

I am trained in nutrition and epidemiology and I enjoy doing research high risk populations here, in the US, and in low-and-middle income countries abroad. My research primarily focuses on identifying modifiable factors, such as diet and the microbiome, that can be leveraged for the prevention of cardiometabolic diseases throughout the life course.

Christine Mitchell, ScM

Christine Mitchell, ScM

Research Interests: Hearing Dysfunction, Falls
Crosscutting Themes and Other Domains: none

I have over a decade of experience working with clinical research studies, with a focus on project management, data coordination, and data analysis. I am the Project Manager of the Childhood Development after Cochlear Implantation (CDaCI) Study and the Study To Understand fall Reduction and vitamin D in You (STURDY).

Erin D. Michos, MD, MHS, FAHA,  FACC

Erin D. Michos, MD, MHS, FAHA, FACC

Research Interests: Cardiovascular Disease and Hypertension
Crosscutting Themes and Other Domains: Women's Health

Dr. Michos is an Associate Professor of Medicine (Cardiology) and Epidemiology. She is the Associate Director of Preventive Cardiology at Johns Hopkins and an Associate Faculty of the Welch Center. Her interests are in preventive cardiology, women and heart disease, lipids, physical activity, and vitamin D.

Elizabeth A. Platz

Elizabeth A. Platz

Research Interests: Cancer
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Metabolomics and Genetics

I am an epidemiologist whose research on cancer and benign conditions of the prostate and colorectum sits at the interface between epidemiology and basic science. Within prospective cohorts, I study the association of genetic and epigenetic factors as well as circulating markers of androgenicity, inflammation, and oxidation with prostate cancer incidence and recurrence. For colorectal neoplasia, my work focuses on the metabolic syndrome, growth factors, and inflammation as sequelae of adiposity. In addition to my research, I direct the NCI-supported T32 Cancer Epidemiology, Prevention, and Control Training Program, I Co-Lead the Cancer Prevention and Control Program at the Sidney Kimmel Comprehensive Cancer Center, and am the Chair of the Maryland Cancer Collaborative, the group responsible for prioritizing and implementing the state’s comprehensive cancer control plan.

Wendy Post

Wendy Post

Research Interests: Cardiovascular Disease and Hypertension
Crosscutting Themes and Other Domains: -

Dr. Wendy Post is Professor of Medicine at the Johns Hopkins University School of Medicine and holds a joint appointment as Professor of Epidemiology at the Johns Hopkins Bloomberg School of Public Health. Dr. Post is a cardiologist at the Johns Hopkins Ciccarone Center for the Prevention of Heart Disease and the Echocardiography Laboratory. She is also associate faculty at the Welch Center for Prevention, Epidemiology, and Clinical Research at Johns Hopkins University.

Tanjala S. Purnell, PhD MPH

Tanjala S. Purnell, PhD MPH

Research Interests: Cardiovascular Disease and Hypertension, Diabetes Mellitus and Obesity, Kidney Disease
Crosscutting Themes and Other Domains: Community Based Participatory Research, Health Behaviors and Lifestyle, Health Disparities and Social Determinants of Health, Health Services Rewsearch and Patient Provider Communication

Tanjala Purnell PhD, MPH is an Assistant Professor of Transplant Surgery and Epidemiology at Johns Hopkins University and Training Director for the Johns Hopkins Center to Eliminate Cardiovascular Health Disparities. Her research focuses on identifying patient-centered and community-engaged solutions to address disparities in access to and quality of care for patients with kidney disease and related risk factors, including diabetes and hypertension.

Casey M. Rebholz, PhD, MPH, MS

Casey M. Rebholz, PhD, MPH, MS

Research Interests: Cardiovascular Disease and Hypertension, Kidney Disease
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Metabolomics and Genetics

As an Assistant Professor of Epidemiology at Johns Hopkins Bloomberg School of Public Health and Associate Faculty at the Welch Center for Prevention, Epidemiology, and Clinical Research, my research focuses on biomarkers in relation to cardiovascular disease and kidney disease. Another one of my main research interests is dietary intake as a modifiable risk factor for cardiovascular and kidney disease. I have been an active investigator in the Atherosclerosis Risk in Communities (ARIC) study and the Chronic Kidney Disease Biomarkers Consortium for the past 3 years.

Jennifer Schrack

Jennifer Schrack

Research Interests: Physical Activity, Aging
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle

I am an exercise physiologist and epidemiologist who studies physical activity, function, and aging. I am especially interested in using wearable technology to measure movement, and the development of methods to translate this data into meaningful health outcomes.

Jodi Segal, MD, MPH

Jodi Segal, MD, MPH

Research Interests: Diabetes Mellitus and Obesity, Sickle-Cell Anemia
Crosscutting Themes and Other Domains: Health Services Rewsearch and Patient Provider Communication, pharmacoepidemiology

I am a general internist and do comparative effectiveness research and pharmacoepidemiology studies.

A. Richey Sharrett

A. Richey Sharrett

Research Interests: Cardiovascular Disease and Hypertension, Mental Illness and Substance Abuse
Crosscutting Themes and Other Domains: vascular cognitive impairments

I am a cardiovascular epidemiologist with a major interest in vascular cognitive impairments

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Sonal Singh

Research Interests: Cardiovascular Disease and Hypertension
Crosscutting Themes and Other Domains: Health Services Rewsearch and Patient Provider Communication

I am a general interest with interests in pharmacoepidemiology and evidence synthesis

Stephen Sozio, MD, MHS

Stephen Sozio, MD, MHS

Research Interests: Cardiovascular Disease and Hypertension, Kidney Disease
Crosscutting Themes and Other Domains: Education

Dr. Sozio is a nephrologist and epidemiologist, with his research focused on vascular biology and stroke in patients with kidney disease, as well as evidenced-based medicine. He also serves in multiple educational leadership roles in the medical school and nephrology fellowship program, and translates these efforts nationally and internationally.

Alfred Sommer

Alfred Sommer

Research Interests: Child survival and blindness prevention
Crosscutting Themes and Other Domains: Health Disparities and Social Determinants of Health, Health Services Rewsearch and Patient Provider Communication

Professor of Epidemiology and Ophthalmology and Dean Emeritus of the Bloomberg School of Public Health.

Rachel J. Thornton, MD, PhD

Rachel J. Thornton, MD, PhD

Research Interests: Cardiovascular Disease and Hypertension, Diabetes Mellitus and Obesity
Crosscutting Themes and Other Domains: Health Behaviors and Lifestyle, Health Disparities and Social Determinants of Health, Child Health

Dr. Thornton's research focuses on child health disparities, and social determinants of health. She is committed to informing the development of novel interventions to eliminate health disparities by addressing individual-, family-, community-, and policy-level factors that contribute to child and adolescent obesity and cardiovascular disease risk.

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Virginia M. Weaver MD MPH

Research Interests: Kidney Disease, Occupational and environmental toxicant exposures
Crosscutting Themes and Other Domains: Environmental Health

Dr. Weaver’s research focuses on the impact of occupational and environmental toxicants, such as lead, cadmium and other metals, on the kidney. Her interests are international, including research in South Korea and Mexico as well as occupational aspects of the current outbreak of chronic kidney disease of unknown etiology, reported in several locations globally.

Scott L. Zeger

Scott L. Zeger

Research Interests: Cancer, Mental Illness and Substance Abuse, pneumonia
Crosscutting Themes and Other Domains: Environmental Health, data science

I am professor of biostatistics with 34 years of experience as a research statistician, biomedical collaborator, and educator of graduate trainees in data science. I currently serve as Director of the Johns Hopkins Individualized Health Initiative (Hopkins inHealth) to catalyze research and training at the interface of biomedical and data science and its translation into tools that foster improved population and patient health management.

Yiyi Zhang

Yiyi Zhang

Research Interests: Cardiovascular Disease and Hypertension
Crosscutting Themes and Other Domains: Metabolomics and Genetics

Dr. Zhang’s work focuses on the study of cardiovascular disease epidemiology, with a special interest in the epidemiologic and clinical issues related to arrhythmia and sudden cardiac death.