[1] Lausanne Univ Hosp CHUV, Dept Oncol, Med Oncol, CH-1011 Lausanne, Switzerland
[2] Univ Lausanne UNIL, Fac Biol & Med, CH-1011 Lausanne, Switzerland
[3] Azienda Osped Univ Careggi, Dept Radiat Oncol, I-50134 Florence, Italy
[4] Antwerp Univ Hosp, Dept Med Oncol, B-2650 Edegem, Belgium
[5] Univ Antwerp, Fac Med & Hlth Sci, B-2610 Antwerp, Belgium