Dr. Kaplitt is vice-chairman for research and director of Stereotactic and Functional Neurosurgery and the Laboratory of Molecular Neurosurgery at Weill Cornell Medical College. He received an AB magna cum lauda in molecular biology from Princeton, a PhD in molecular neurobiology from The Rockefeller University and an MD from Cornell Medical College. Following neurosurgery residency at The New York Hospital, he completed a stereotactic and functional neurosurgery fellowship at the University of Toronto. In 1994, he was first author of a Nature Genetics paper which first reported adeno-associated virus as a gene transfer agent in the brain and, in 2003, he performed the first human gene therapy surgery for Parkinson's disease (PD), which led to the first successful randomized, double-blind study of gene therapy for a neurological disease. He actively treats individuals with PD deep brain stimulation and his research focuses on complications of therapy and non-motor symptoms of the disorder.