[1] Hosp Univ Son Espases, Palma De Mallorca, Spain
[2] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[3] Univ Minnesota, Masonic Canc Ctr, Minneapolis, MN USA
[4] Univ Penn, Sch Med, Philadelphia, PA 19104 USA
[5] Beth Israel Deaconess Med Ctr, New York, NY 10003 USA
[6] Med Univ Wien, Vienna, Austria
[7] Skane Univ Hosp, Lund, Sweden
[8] Stanford Univ, Ctr Canc, Stanford, CA 94305 USA
[9] Amgen Inc, Thousand Oaks, CA 91320 USA