Breadcrumb Centers And ServicesAdolescent Bariatric Surgery Meet The Adolescent Bariatric Surgery Team Copy URL to Clipboard URL COPIED! Print Meet the Adolescent Bariatric Surgery Team Elizabeth Renaud, MD Medical Director, Pediatric Trauma, and Adolescent Bariatric Surgeon More Artur Chernoguz, MD Pediatric Surgeon More Vania L. Kasper, MD Medical Director, Pediatric Gastroenterology, Nutrition and Liver Diseases; and Director, Cystic Fibrosis Program More Beth Ann Ryder, MD Program Director, Center for Bariatric Surgery More Sara Stiles, RD, CSOWM, LDN Lead Bariatric Registered Dietitian, Center for Bariatric Surgery More Christine M. Nunes, PsyD Pediatric Psychologist More Kellie Armstrong, MSN, RN, FASMBS-IH, CBN Program Manager, Center for Bariatric Surgery More Adolescent Bariatric Surgery Contact Adolescent Bariatric Surgery Meet the Team