[1] EuropaColon, Salisbury, Wilts, England
[2] Dom Zdravlja Vozdovac, Belgrade, Serbia
[3] Semmelweis Univ, Budapest, Hungary
[4] Hosp Puerta de Hierro Majadahonda, Majadahonda, Spain
[5] Hosp Puerta de Hierro Majadahonda, Serv Oncol Med, Majadahonda, Madrid, Spain
[6] ICO Hospitalet, Lhospitalet De Llobregat, Spain
[7] Catalan Inst Oncol, Barcelona, Spain