Renata Sanders, MD

Dr. Errol L. Fields is an Associate Professor of Pediatrics in the Division of Adolescent/Young Adult Medicine at the Johns Hopkins University School of Medicine. He holds a joint appointment in the Bloomberg School of Public Health’s Department of Health, Behavior and Society. A physician-researcher, Dr. Fields is a pediatrician and adolescent medicine subspecialist. He provides primary care and subspecialty consultative care to adolescents and young adults including inclusive sexual and reproductive health care and treatment and prevention of HIV and other sexually transmitted infections His research focuses on using mixed methodologies to understand and reduce HIV disparities among adolescent and young adult Black gay, bisexual and other men who have sex with men (MSM) as well as the evaluation of community-engaged practices for reducing stigma and medical distrust as key barriers to HIV prevention, treatment and research. Dr. Fields is also committed to the provision of evidence-based, culturally competent care of sexual and gender minority youth and is involved in undergraduate, graduate, and continuing medical education in this area. Dr. Fields began his training in research and public health while completing a master of public health at Columbia University Mailman School of Public Health. He continued his education and training in the Medical Scientist Training Program at Johns Hopkins, where he earned his medical doctorate and his doctorate in philosophy from the School of Medicine and Bloomberg School of Public Health respectively. He completed pediatric residency training at Boston Children’s Hospital and Boston Medical Center and his subspecialty fellowship training in adolescent medicine at Johns Hopkins School of Medicine.

Dr. Rebecca Ruebner is an Associate Professor of Pediatrics at the Johns Hopkins University School of Medicine. She provides care for children with kidney problems of any type including hypertension, hematuria, proteinuria, kidney stones, chronic kidney disease, dialysis, and kidney transplant. She is the medical director of pediatric dialysis. Dr. Ruebner received her undergraduate and medical degrees from the University of Pennsylvania. She completed her residency at Boston Children’s Hospital where she also served as chief pediatric resident. She completed her fellowship in pediatric nephrology at the Children’s Hospital of Philadelphia. During her fellowship, she received a Master's Degree in Clinical Epidemiology from the University of Pennsylvania. Dr. Ruebner became a faculty member at the Children's Hospital of Philadelphia in 2012 before joining the Johns Hopkins faculty in 2016. Dr. Ruebner's clinical research is focused on clinical care and outcomes of children with chronic kidney disease and end-stage kidney disease.

Dr. Arik Marcell is a tenured professor of pediatrics at the Johns Hopkins University School of Medicine. His areas of clinical expertise include adolescent medicine, male reproductive health and pediatrics. Dr. Marcell holds a joint appointment in the Department of Population, Family and Reproductive Health at the Johns Hopkins Bloomberg School of Public Health. He earned his M.D. from the University of Illinois College of Medicine and his M.P.H. from the Johns Hopkins Bloomberg School of Public Health. He completed his residency at the University of Wisconsin Hospital and Clinics and fellowship in adolescent medicine at the University of California in San Francisco. Dr. Marcell has led updates to the nation's Title X guidelines on men’s health for clinical preventive service recommendations on family planning and sexual and reproductive health. He directs the Title X program at the Harriet Lane Clinic and recently received funding from the Office of Family Planning to integrate rapid HIV testing in the clinic. Dr. Marcell is faculty sponsor for the Bloomberg School of Public Health’s certificate in adolescent health. His teaching excellence has been recognized from the Bloomberg School of Public Health for his course on Masculinity, Sexual Behavior, and Health- one of the only men's health-focused courses being taught in the nation in a public health school.