Zeev Harel, M.D., Hasbro Children's Hospital (IMAGE) Lifespan Caption A study led by Zeev Harel, M.D., an adolescent medicine specialist at Hasbro Children's Hospital in Providence, RI, has found that most obese adolescents are lacking in vitamin D. Credit Hasbro Children's Hospital Usage Restrictions With name and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.