John R. Adler M.D. is a neurosurgeon, the Dorothy and Thye King Chan Endowed Professor of Neurosurgery at Stanford University School of Medicine, and Vice Chair for Innovation and Technology in the Department of Neurosurgery at Stanford University School of Medicine. In April 2010, Dr. Adler was appointed Vice President and Chief of New Clinical Applications at Varian Medical Systems. He is the father of Trip Adler, co-founder and CEO of Scribd.