The European Organization for Research and Treatment of Cancer QLQ-C 30: A Quality-of-Life Instrument for Use in International Clinical Trials in Oncology. - Aaronson,N.K.; Ahmedzai,S.; Bergman,B.; Bullinger,M.; Cull,A.; Duez,N.J.; Filiberti,A.; Flechtner,H.; Fleishman,S.B.; de Haes,J.CJM.; Kaasa,S.; Klee,M.; et al. (J Natl Cancer Inst, 1993)