Our Team Our specialists are committed to providing the most current treatment modalities. The GI team works closely with other subspecialty divisions (pulmonary, genetics, transplantation, etc.) to provide the most comprehensive patient care possible. Chief of Pediatric Gastroenterology and Nutrition Lawrence J. Saubermann, M.D. Pediatric Gastroenterologists Rebecca Abell, D.O. Marilyn R. Brown, M.D. Megan Gabel, M.D. Nishaben Patel, M.D. Thomas M. Rossi, M.D. Fellows Walaa Elfar, M.B.CH.B. Albert Chan, M.D. Marianna Middelhof, M.D. Nurses Colleen Hill-Sober, R.N., M.S., P.N.P.-B.C., F.N.P. Jean Mooney, R.N., M.S.,C.P.N.P. Karen VanNorman, B.S.N., R.N., C.G.R.N. Registered Dietician Elizabeth Carnes, R.D. Donna Quinzi, R.D. Social Work Jennifer Aquilina, L.M.S.W.