Mark Zimmerman, M.D., Rhode Island Hospital (image) Lifespan Share Print E-Mail Caption Research led by Mark Zimmerman, M.D., director of outpatient psychiatry at Rhode Island Hospital, indicates that the DSM-IV three-point dimensional approach is an effective method in identifying personal disorders and argues against proposed changes to DSM-5. Credit Rhode Island Hospital Usage Restrictions with Title and Credit. Share Print E-Mail 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.