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Dr. Trent is a pediatrician and adolescent medicine specialist on the faculty of the Johns Hopkins University Schools of Medicine, Nursing, and Public Health who has been consistently ranked by her peers as a 'top doc serving adolescents  in the greater Baltimore Metropolitan area.  She is an independent scientist that serves as the principal or key investigator multiple research projects funded by the National Institutes of Health (NIH) and other funding agencies. A major focus of Dr. Trent’s research and clinical interest has been on reducing adolescent and young adult sexual and reproductive health disparities.  She is also committed to producing the next generation of adolescent health scientists and directs the NIH-funded Adolescent Reproductive Health  T32 Training Program within Johns Hopkins Medicine. She is a sought-after speaker and the author of scientific research articles, editorials, book chapters, and patient-directed media materials in the field of adolescent health.  She has been recognized for her work by medical associations and the lay pres and has subsequently emerged as an important voice in the field of  adolescent sexual and reproductive health.  Dr. Trent serves as the Chair of the Section on Adolescent Health for the American Academy of Pediatrics, on the board of directors for the American Sexual Health Association, and as the President-elect for the Society for Adolescent Health and Medicine.


Hoover aDger, Jr., MD, MPH, mBA

Dr. Adger is Professor of Pediatrics at the Johns Hopkins University School of Medicine, Division of General Pediatrics and Adolescent Medicine which he joined in 1984. Since that time, he has served as Director of the Substance Abuse Assessment/Intervention Team at The Johns Hopkins Hospital Adolescent Program and as Director of The Johns Hopkins Substance Abuse Faculty Development Programs. In February 1997, Dr. Adger was selected to fill the position of Deputy Director of the White House Office of National Drug Control Policy. In July 1998, he returned to Johns Hopkins to resume his duties as a full-time faculty member. From 1999-2005, he served as Co-Director of the Strategic Planning Initiative funded by HRSA and SAMHSA/CSAT to advise the federal government and others on improving and expanding interdisciplinary education and training of health professionals in substance use disorders. He currently serves as principal investigator and project director of the HRSA-funded Leadership & Education in Adolescent Health project at the Johns Hopkins Hospital and as the faculty leader of the Florence Sabin College in the Johns Hopkins School of Medicine. Dr. Adger also is a past president of the Association for Medical Education and Research in Substance Abuse and a past president of the National Association for Children of Alcoholics.

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Dr. Sanders is a board certified internal medicine, pediatrics and adolescent medicine specialist. Her research focuses on improving the sexual health of African American adolescent men who have sex with men. She is currently the Principal Investigator of a K23 Career Development Award from NICHD to examine reasons for and satisfaction with first and subsequent penetrative same-sex sexual experiences (PSSE) and to examine the role of first PSSE on second and subsequent PSSEs in African American men and how social context impacts sexual satisfaction with first PSSE; how sexual satisfaction during first PSSE impacts time to second partner and satisfaction with second PSSE; and engagement in young adult sexual health protective behaviors during most recent sex. She has served as consultant to the Centers for Disease Control and Prevention (CDC), as representative of the Maryland Chapter of American Academy of Pediatrics to the Maryland General Assembly to make recommendations regarding HIV testing laws in Maryland, and has worked with the Baltimore City Health Department to improve HIV testing strategies in African American men who have sex with men (MSM). She serves as the Leadership Education Adolescent Health Interdisciplinary Associate Training Director and the Community Protocol Project Director and co-Investigator of the Johns Hopkins Adolescent Trials Network Site.

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Arik V. Marcell, MD, MPH

Dr. Marcell is an Associate Professor with a primary appointment in the Johns Hopkins School of Medicine Department of Pediatrics and a joint appointment in the Bloomberg School of Public Health Department of Population, Family and Reproductive Health. He is a pediatrician and adolescent medicine specialist and provides primary and subspecialty consultation services at the Center for Adolescent and Young Adult Health at Johns Hopkins Harriet Lane Clinic and subspecialty consultation services in the Johns Hopkins Children’s Hospital. He is the Director of Adolescent Clinical Services at the Harriet Lane Clinic and has directed its Title X program for over 12 years, a federal program designed to increase access family planning services to uninsured, underinsured and confidential seeking adolescents and young adults.

A major focus of Dr. Marcell’s research is on improving adolescent sexual and reproductive health and access to care, especially for male adolescents and young adults and he uses a variety of research strategies to examine this from patient and provider perspectives. He conducts interdisciplinary research that integrates behavioral science, health services research, and public health practice. Dr. Marcell just completed serving as primary investigator on a CDC-funded project to train youth-serving professionals on a clinical guide to engage young males in sexual and reproductive healthcare services. He also served as the primary investigator on an Office of Population Affairs project to integrate HIV testing in the Title X-funded Harriet Lane Clinic. Dr. Marcell recently led the first men’s health updates to the nation’s Title X Clinical Guidelines, using an evidence-informed approach that was published by the Office of Population Affairs and the Centers for Disease Control and Prevention in the 2014 Morbidity and Mortality Weekly Report entitled Providing Quality Family Planning Services. Dr. Marcell’s efforts are ensuring the inclusion of men in this national guidance. He is the immediate past Chair of the Society for Adolescent Health and Medicine's committee on Sexual & Reproductive Health and member of the American Academy of Pediatrics’ Committee on Adolescence. He has extensive experience training health professionals on topics such as STDs, adolescent health, and male sexual and reproductive health. He has received multiple teaching excellence awards for his course at the Bloomberg School of Public Health on Masculinity, Sexual Behavior & Health: Adolescence & beyond.

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Errol L. Fields, MD PhD MPH

Dr. Fields is an Assistant Professor in the Division of General Pediatrics and Adolescent Medicine at Johns Hopkins School of Medicine and is a board-certified pediatrician and adolescent medicine subspecialist. As a physician researcher he has dedicated his career to improving the health and life outcomes of adolescents and emerging adults, with particular attention to vulnerable and marginalized youth, through research, clinical medicine, education and advocacy, affecting change at both the individual and community/population level.

He is especially interested in the treatment and prevention of HIV and other sexually transmitted infections (STIs) in adolescent and young adult populations. His research focuses on using mixed methodologies to understand and reduce racial disparities in HIV among adolescent and young adult Black, gay, bisexual and other men who have sex with men (GBMSM). He is funded by the CDC through the Minority HIV/AIDS Research Initiative (PI: Fields) and the NIH through a Center for AIDS Research (CFAR) supplement (PI: Fields) in studies examining affiliation networks of sex partner meeting venues of MSM to identify high risk sex partner meeting venues connected by ongoing HIV transmission networks among users. He is also faculty in the Center for Child and Community Health Research (CCHR) and a co-investigator on collaborative work with the Baltimore City Health Department (BCHD) to identify high HIV transmission areas among GBMSM in Baltimore City using HIV/STI surveillance data. This data driven seek-test-treat strategy enhances existing testing and linkage to care strategies to increase case finding among those at highest risk. 

Dr. Fields is also interested in the provision of evidence-based, culturally competent care of sexual and gender minority youth and is involved in undergraduate, graduate, and continuing medical education and training in this area. He is currently funded by a Johns Hopkins Children’s Center Innovation Grant (PI: Fields, Hedian) to assess pediatric and internal medicine resident knowledge and clinical competencies and develop an educational curriculum regarding the care and specific health needs of LGBTQ patients.

Dr. Fields is also a clinician in the Harriet Lane Clinic.  He provides primary and subspecialty care in the Center for Adolescent and Young Adult Health and HIV care to youth living with HIV in the Intensive Primary Care Clinic. He is also the co-director of the PrEP is for YOUth program where he provides pre-exposure prophylaxis (PrEP) for adolescent and young adults at risk for HIV and the Emerge Clinic for Child, Adolescent, and Young Adult Gender and Sexuality where he providesgender affirming health care for transgender and gender nonbinary youth and young adults.

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Pamela Matson, PhD, MPH

Dr. Matson is an Assistant Professor of Pediatrics in the Division of General Pediatrics and Adolescent Medicine at Johns Hopkins School of Medicine.  She is the Research Director for the HRSA funded Leadership Education in Adolescent Health (LEAH) Program.  Dr. Matson is an Epidemiologist who earner her M.P.H. in Epidemiology of Microbial Diseases from Yale University School of Public Health and her Ph.D. in Infectious Disease Epidemiology from Johns Hopkins Bloomberg School of Public Health. Her area of research has focused primarily on understanding the role of romantic relationship context on adolescent risk for sexually transmitted infections (STI), substance use and dating violence.  Infused throughout this work is an examination of how changes in relationship context correlate with changes in individual behavior over the course of development from adolescence into young adulthood.  She has collected prospective data from several cohorts, including intensive daily data using cell phones, to examine the variability within adolescent relationships.  As part of her career development award (K01) from the National Institute of Drug Abuse, Dr. Matson is receiving training on systems science methodologies with the goal of incorporating important complexities of peer socialization processes and the broader social context, which maintain vicious cycles that produce health disparities in the areas of substance use, teen dating violence and STI/HIV.  Dr. Matson is also engaged in research and training to incorporate a family systems approach to improve prevention and early intervention of adolescent substance use in primary care settings.

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Kathy Tomaszewski, RN, BSN

Mrs. Tomaszewski is the Adolescent Nurse Coordinator who thoroughly enjoys working with adolescents and young adults during this exciting time in their development.  She aims to foster independence while helping patients navigate the Hopkins environment and assume increasing responsibility for their health as they bridge to adulthood.   She manages core clinical programs, including Title X, LARC Project and Family Planning Clinic, MARC Project (DepoProvera), , Transition Program, Gender Clinic and integrated HIV testing program, and is involved in core research projects designed to improve clinical care delivery (MyChart, DepoText, adolescent immunization project, pregnancy QI project, preconception care project, enhanced medical home model for children with special health care needs).  Kathy facilitates patient intake for subspecialty referrals from outside physicians and parents, and works with physicians and staff across the institution to ensure adolescents feel at home and connected in the Hopkins environment.  At an institutional level, she created protocols allowing clinic nurses' broadened independence in providing reproductive health care, and is currently working with pediatric nurse leadership to provide professional development that and moves the discipline in line with stated institutional goals.  A graduate of the University of Maryland School of Nursing, she has many years of experience as a pediatric nurse in the hospital and provided care to mothers in the prenatal and post-natal periods (including lactation consultation) as an independent childbirth educator.  Work with youth in school health programs in the Baltimore metropolitan area, including the Baltimore City School Based Health Center Program, renewed an interest in community health that led her to our clinic where research, public health, education, and patient care intersect.  The opportunity to contribute as an interdisciplinary team member is a highlight of the program that is unmatched.  In addition to her professional training as a nurse, Kathy has seen her own four children through adolescence and could not be more proud of the wonderful people they are.

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Tisha R. James, LGSW

Ms. James is a Licensed Graduate Social Worker who received her Masters of Social Work from The University of Maryland School of Social Work with a concentration in Clinical Work with Children and Families. Ms. James is the Social Work Discipline Leader for the Johns Hopkins University’s LEAH Program and the Adolescent Social Worker at Johns Hopkins Harriet Lane Outpatient Clinic. Prior to joining Johns Hopkins, Ms. James has served as a Mental Health Therapist with National Pike Health Care Center and programs that practice Multi-Systemic Therapy. As a Mental Health Therapist she provided individual and family therapy as well as developed and implemented individualized treatment plans for children, adolescents and adults with clinical diagnoses. Ms. James worked within agencies that contracted with the State of Maryland to provide intensive therapeutic services to chronic and violent juvenile offenders and their families to prevent recidivism including addressing all environmental systems that have been impacted. In addition, she has also served as a Rehabilitation Specialist serving communities in the Baltimore City area during which time she partnered with individuals and families to facilitate connections to vocational and rehabilitative services, services to reduce the necessity for hospitalization and or incarceration, and services to increase the client’s capacity for independent living. Throughout her career, Ms. James has mastered the utilization of clinical treatment methods compatible with Multi-Systemic therapy principles and practices including but not limited to cognitive behavioral therapy, behavioral management training, family therapy and community psychology. In her role with the LEAH Program, Ms. James partners with a multidisciplinary team in research, teaching and clinical endeavors aimed at reducing health care disparities among the adolescent population. As Adolescent Social Worker at the Harriet Lane Clinic, Ms. James conducts assessments for strategic identification of health disparities, applying evidence-based clinical interventions to promote comprehensive adolescent care.


Judy Kandel, BSN, MPH, CPNP

Ms. Kandel has been working as a Pediatric Nurse Practitioner for 23 years and for the past 17 years, she has provided comprehensive health care to adolescents and young adults through the age of 21. She is a graduate of the Boston University School of Nursing (BSN), University of North Carolina at Chapel Hill School of Public Health (MPH), and the University of Maryland School of Nursing (PNP).  Between the years 2000-2011, she worked closely with our team at a Baltimore City Health Department School Based Health Center. During those years, she exclusively worked with youth attending a Baltimore City High School providing routine adolescent health maintenance services, gynecological care, contraceptive counseling and treatment, and STI treatment as core activities.  Prior to joining our team in 2018, she worked as a PNP at Health Care for the Homeless, where she continued to provide care to youth and young adults with additional focus on Screening, Brief Intervention, Referral, and Treatment of substance use disorders. Her professional Affiliations include the Coalition for Homeless Families and Unaccompanied Youth (COHO), Community Health Providers and School Leaders Workgroup focused on finding strategies to decrease the absenteeism rate in children and youth attending Baltimore City Schools, and an adjunct appointment at the Johns Hopkins School of Nursing where she has served as a preceptor to family and pediatric nurse practitioner students since 2009.


Adolescent Health T32 Research Faculty  


Hoover Adger, Jr., MD, MPH, MBA – Adolescent Medicine, Addiction Medicine

Allison Agwu, MD, MPH – Pediatrics/Infectious Disease

Harolyn M. E. Belcher, MD, MHA – Kennedy Krieger Institute, Public Health/Mental Health

Chris Beyer, MD, MPH - Epidemiology

Anne Burke, MD, MPH – Gynecology & Obstetrics

Laura E. Caulfield, PhD – Public Health, Program in Human Nutrition, Department of International Health

David D. Celentano, ScD – Public Health/Epidemiology

Tina L. Cheng, MD, MPH – Director, Department of Pediatrics

Charlotte A. Gaydos, DrPH, MPH – Infectious Diseases

Ronald H. Gray, MD – Epidemiology, Population, Family, and Reproductive health

David R. Holtgrave, PhD – Public Health/Health Behavior and Society

Nicholas Ialongo, PhD - Psychology/Public Health

Jacky M. Jennings, PhD – Pediatrics/Public Health Epidemiology

Sara B. Johnson, PhD, MPH – Pediatrics/Public Health

Arik V. Marcell, MD, MPH – Adolescent Medicine

Shruti H. Mehta, PhD – Public Health/Epidemiology

Cynthia S. Minkovitz, MD – Public Health/Population, Family, and Reproductive Health

Joshua Sharfstein, MD – Public Health

Phyllis W. Sharps, PhD, RN, FAAN – Nursing

Susan G. Sherman, PhD, MPH – Public Health/Epidemiology

Roland J. Thorpe, Jr., PhD – Health, Behavior, and Society

Maria E. Trent, MD, MPH – Adolescent Medicine

Maria J. Wawer, MD  – Epidemiology