[1] Univ Hosp Salamanca, IBSAL, Salamanca, Spain
[2] Wilhelminenspital Stadt Wien, Wilhelminen Canc Res Inst, Vienna, Austria
[3] Mayo Clin, Rochester, MN USA
[4] Weill Cornell Med, New York, NY USA
[5] Amgen Inc, Thousand Oaks, CA 91320 USA
[6] Univ Athens, Sch Med, Athens, Greece