After more than four decades living with multiple sclerosis, New York Times bestselling author Richard M. Cohen finds a flicker of hope in a groundbreaking medical procedure.Richard Cohen struggles with failing limbs and is legally blind. He has survived two bouts of colon cancer and a life-threatening blood clot in his lungs. After enduring decades of harsh treatments and invasive therapies, Cohen decided to trade in his life as a patient.In 2012,...