[1] EuropaColon, Salisbury, Wilts, England
[2] Ctr Onkol Inst M Sklodowskiej Curie, Warsaw, Poland
[3] Ctr Clin Oncol Prov Hosp 1, Rzeszow, Poland
[4] Univ Autonoma Barcelona, Hosp Valle de Hebron, Barcelona, Spain
[5] Alcala Univ, Hosp Univ Ramon y Cajal, CIBERONC, IRYCIS, Madrid, Spain
[6] Semmelweis Univ, Budapest, Hungary
[7] Evidera, Budapest, Hungary
[8] Semmelweis Univ, Fac Hlth Sci, Budapest, Hungary