1. a Division of Medical Oncology, Mayo Clinic, Rochester, Minnesota, USA
2. b Cancer Center Statistics, Mayo Clinic, Rochester, Minnesota, USA
3. c Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA
4. d Department of Psychiatry and Psychology, Mayo Clinic, Rochester, Minnesota, USA
5. e Division of Pulmonary Medicine, Mayo Clinic, Rochester, Minnesota, USA
6. f Division of Epidemiology, Mayo Clinic, Rochester, Minnesota, USA