Many Lives Many Masters About the Author Brian Weiss graduated magna cum laude from Columbia University and received his medical degree at the Yale University School of Medicine. After serving his internship at New York University's Bellevue Medical Center, he went on to become chief resident, Department of Psychiatry, at the Yale University School of Medicine. Currently, Dr. Weiss is Chairman of the Department of Psychiatry at Mount Sinai Medical Center in Miami Beach, Florida, and an associate professor at the University of Miami School of Medicine. He specializes in the study and treatment of depression and anxiety states, sleep disorders, substance abuse disorders, Alzheimer's Disease, and brain chemistry.