[1] Univ Barcelona, Hosp Clin IDIBAPS, Barcelona, Spain
[2] CHU Vaudois, Lausanne, Switzerland
[3] Univ Lausanne, Lausanne, Switzerland
[4] Natl & Kapodistrian Univ Athens, Athens, Greece
[5] Hosp Clin Barcelona, Barcelona, Spain
[6] Univ Barcelona, Hosp Clin, Barcelona, Spain
[7] Univ Miami, Miller Sch Med, Sylvester Canc Ctr, Miami, FL 33136 USA
[8] Hosp Clin Barcelona, Barcelona, Spain