(L-R) Dr. Marc de Perrot, Thoracic Surgeon and Dr. John Cho, Radiation Oncologist looking at x-rays of patient John Nolan's lungs after he was diagnosed and operated on for the asbestos related cancer mesothelioma at Toronto General Hospital. John Nolan had his lung removed as part of the procedure. (Credit Image: © Louie Palu/ZUMA Press)