MD - Alpert Medical School of Brown University, Providence, RI
Pediatrics - Rainbow Babies and Children's Hospital, Cleveland, OH
Gastroenterology - The Children's Hospital of Philadelphia, Philadelphia, PA
Pediatric Gastroenterology – American Board of PediatricsPediatrics – American Board of Pediatrics
Gastroenterologist
Assistant Professor of Clinical Pediatrics (Gastroenterology, Hepatology and Nutrition), Perelman School of Medicine at the University of Pennsylvania
Atia O, Shavit-Brunschwig Z, Mould DR, Stein R, Matar M, Aloi M, Ledder O, Focht G, Urlep D, Hyams J, Broide E, Weiss B, Levine J, Russell RK, Turner D: Outcomes, dosing and predictors of vedolizumab treatment in children: results from the prospective, multi-center VEDOKIDS study. The Lancet Gastroenterology & Hepatology 8(1): 31-42, January 2023.
Zhou Y, Shi J, Stein R, Liu X, Baldassano RN, Forrest CB, Chen Y, Huang J: Missing data matter: an empirical evaluation of the impacts of missing EHR data in comparative effectiveness research. Journal of the American Medical Informatics Association 30(7): 1246-1256, June 2023.
Crisci M, Vellanki S, Baldassano RN, Chen Y, Liu Y, Stein R, Hatch-Stein J: Growth hormone use in pediatric inflammatory bowel disease. J Pediatr Endocrinol Metab Epub. Ahead of Print, October 2023.
Chen A, Stein R, Baldassano RB, Huang J: Learning longitudinal patterns and subtypes of pediatric Crohn disease treated with infliximab via trajectory cluster analysis. Journal of Pediatric Gastroenterology and Nutrition 74(3): 383-388, March 2022.
Atia O, Pujol-Muncunill G, Navas-Lopez VM, Orlanski-Meyer E, Ledder O, Lev-Tzion R, Focht G, Shteyer E, Stein R, Aloi M, Russell RK, Martin-de-Carpi J, Turner D: Children included in randomized clinical trials of biologics in inflammatory bowel diseases do not represent the real-world patient mix. Alimentary Pharmacology and Therapeutics 56(5): 794-801, September 2022.
Constant BD, Baldassano R, Kirsch J, Mitchel EB, Stein R, Albenberg L: Tofacitinib salvage therapy for children hospitalized for corticosteroid- and biologic-refractory ulcerative colitis. Journal of Pediatric Gastroenterology and Nutrition 75(6): 724-730, December 2022.
Moore H, Dubes L, Fusillo S, Baldassano RN, Stein R: Tofacitinib therapy in children and young adults with pediatric-onset medically-refractory inflammatory bowel disease. Journal of Pediatric Gastroenterology and Nutrition 73(3): e57-e62, September 2021.
Conrad MA, Stein RE, Maxwell EC, Albenberg L, Baldassano RN, Dawany N, Grossman AB, Mamula P, Piccoli DA, Kelsen JR: Vedolizumab therapy in severe pediatric inflammatory bowel disease. Inflammatory Bowel Diseases 22(10): 2425-2431, October 2019.
Sahn B, De Matos V, Stein R, Ruchelli E, Masur S, Klink AJ, Baldassano RN, Piccoli DA, Russo P, Mamula P.: Histological features of ileitis differentiating pediatric Crohn disease from ulcerative colitis with backwash ileitis. Digestive and Liver Disease 50(2): 147-153, February 2018.
Stein R, Plantz K, Maxwell EC, Mamula P, Baldassano RN: Intravenous iron sucrose for treatment of iron deficiency anemia in pediatric inflammatory bowel disease. Journal of Pediatric Gastroenterology and Nutrition 66(2): e51-e55, February 2018.
Conrad MA*, Stein RE*, Maxwell EC, Albenberg L, Baldassano RN, Dawany N, Grossman AB, Mamula P, Piccoli DA, Kelsen JR. Vedolizumab in severe pediatric inflammatory bowel disease. Inflamm Bowel Dis. 2016 Oct;22(10):2425-31. *Co-first authorship
Stein R, Lee D, Leonard MB, Thayu M, Denson LA, Chuang E, Herskovitz R, Kerbowski T, Baldassano RN. Serum infliximab, anti-drug antibodies, and tumor necrosis factor predict sustained response in pediatric Crohn disease. Inflamm Bowel Dis. 2016 June;22(6):1370-7.
Stein R, Chelimsky T, Li H, Chelimsky G: Functional gastrointestinal disorders in a primary care clinic. Global Pediatric Health 2: 1-9, 2015 Notes: doi: 10.1177/2333794X14568452.
Hamdy RF, Stein RE, Larru B, Bellah RD, Grossman AB, Hodinka RL, Feemster KA: Gallbladder wall thickening in an adolescent with acute mononucleosis: A case report and brief review of the literature. J Ped Infect Dis 4(3): 267-271, September 2015.
Ronen E Stein, Sudha Anupindi, and Robert N Baldassano: Inflammatory Bowel Disease. Nelson Textbook of Pediatrics 22nd edition, 2023 Notes: Chapter.
Ronen Stein and Robert Baldassano: Eosinophilic Gastroenteritis. Nelson Textbook of Pediatrics 22nd edition, 2023 Notes: Chapter.
Stein RE and Mascarenhas MR: Nutrition in inflammatory bowel disease. Nutrición en Pediatría. Adriana Fernandez and Debora Setton (eds.). Ed Panamericana, 2nd edition, 2021 Notes: Chapter.
Stoner N, Stein RE: Dietary therapies for inflammatory bowel disease. Pediatric Inflammatory Bowel Disease. Mamula, P., Grossman, A.B., Baldassano, R.N., Kelsen, J.R., Markowitz, J.E (eds.). 4th Edition , 2021 Notes: Chapter.
Stein RE and Baldassano RN: Eosinophilic gastroenteritis. Nelson Textbook of Pediatrics. Kleigman RM, St Geme JW, Shah SS, Tasker RC, Wilson KM (eds.) Elsevier, 21st edition: 1987, 2020.
Stein RE and Baldassano RN: Inflammatory bowel disease. Nelson Textbook of Pediatrics. Kleigman RM, St Geme JW, Shah SS, Tasker RC, Wilson KM (eds.) Elsevier, 21st edition: 1973-86, 2020.
Stein RE and Baldassano RN: Dietary therapies for inflammatory bowel disease. Pediatric Inflammatory Bowel Disease. Mamula, P., Grossman, A.B., Baldassano, R.N., Kelsen, J.R., Markowitz, J.E (eds.). Springer, 3rd edition: 473-483, 2017.
Ledder O, Dubinsky M, Dolinger M, Fatima A, Suskind D, Scarlett J, Röeser D, Shouva D, Meyer G, Molle Rios, Z, Pujol G, Lozano A, Kolho KL, Rohani P, Hussey S, de Mejji T, Ayers T, Navas López VM, Turner D, Tzivinikos C, Stein, R, Savla S: Tofacitinib in pediatric ulcerative colitis: a retrospective multi-center experience from the Paediatric IBD Porto group of ESPGHAN. Journal of Crohn's and Colitis 17(1 ): i758, February 2023.
Kirsch J, Stein R, Baldassano R, Albenberg L, Constant B: Tofacitinib salvage therapy in pediatric patients hospitalized for ulcerative colitis. Abstract for poster presentation at Digestive Diseases Week, San Diego, CA 2022.
Shavit-Brunschwig Z, Stein R, Aloi M, Ledder O, Focht G, Urlep D, Hyams J, Broide E, Weiss B, Levine J, Shouval D, Matar M, Assa A, Rosh J, Hussey J, Markowitz J, Yerushalmy-Feler A, Miele E, Shaoul R, Russell RK, Turner D: Outcome of induction therapy with vedolizumab in children: results from the prospective, multi-center VEDOKIDS study. Abstract for oral presentation at Digestive Diseases Week, San Diego, CA 2022.
Crisci M, Vellanki S, Baldassano RN, Chen Y, Liu Y, Stein R, Hatch-Stein J: Growth hormone use in pediatric inflammatory bowel disease. Abstract for poster presentation at North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition Annual Meeting, Virtual 2021.
Moderator, Clinical collaboration for the "IBD-ologist" session, Personalized IBD and VEO-IBD, Genomics, Microbiome, Biologics, and Beyond Conference, Children's Hospital of Philadelphia. Virtual. Nov 2022.
2021-2023, GI Fellows' Teaching Award Honor Roll, Children's Hospital of Philadelphia
2016, Research Poster Day Award, The Children’s Hospital of Philadelphia
2013, Science Day Resident Research Award, Rainbow Babies and Children's Hospital
2013, Third-Year Resident Teacher of the Year Award, Rainbow Babies and Children's Hospital
2012, Second-Year Resident Teacher of the Year Award, Rainbow Babies and Children's Hospital
2011, First-Year Resident Teacher of the Year Award, Rainbow Babies and Children's Hospital
2020-present, Peer Reviewer, Pharmacoepidemiology and Drug Safety
2020-present, Peer Reviewer, Journal of Pediatric Gastroenterology and Nutrition
2019-present, Pediatric GI Fellowship Program Evaluation Committee
2013-present, North American Society for Pediatric Gastroenterology, Hepatology and Nutrition
2013-present, Crohn's & Colitis Foundation of America
2013-present, American Gastroenterological Association