1882350 EORTC European Organization for Research and Treatment of Cancer 2287 1882356 EORTC EORTC 22922-10925 3 1882349 EORTC European Organization for the Treatment and Research of Cancer 3 1882352 EORTC early clinical trials group 1 1882354 EORTC EORTC Quality of Life Questionnaire C30-BR23 1 1882355 EORTC EORTC ROG and LG 1 1882351 EORTC European organization and cancer treatment quality of life questionnaire 1 1882353 EORTC existing prognostic models 1