1. First Medical Oncology Clinic, Saint-Savvas Anticancer Hospital, Athens, Greece
2. Department of Oncology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
3. Fourth Department of Internal Medicine, Hematology Oncology Unit, Attikon University General Hospital, National and Kapodistrian University of Athens, Athens, Greece
4. Second Pathology Department, National and Kapodistrian University of Athens, Attikon University General Hospital, Athens, Greece
5. Algoma District Cancer Program, Sault Area Hospital, Sault Ste. Marie, ON, Canada
6. Division of Clinical Sciences, Northern Ontario School of Medicine, Sudbury, ON, Canada