1. Centro Integral Oncológico Clara Campal and START Madrid, Madrid, Spain
2. Medical Oncology, I.R.C.C.S. San Matteo University Hospital Foundation, Pavia, Italy
3. Clinic for Hematology, Hemostaseology, Oncology & Stem Cell Transplantation, Medical School of Hannover, Hannover, Germany
4. Department of Medical Oncology, Gustave Roussy, Villejuif, France