"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, Cohen and his wife, Meredith Vieira, were invited to host and chair an adult stem cell conference at the Vatican. Scientists would be gathering in Rome to discuss stem cell...