Authors:
GROENVOLD M
KLEE MC
SPRANGERS MAG
AARONSON NK
Citation: M. Groenvold et al., VALIDATION OF THE EORTC QLQ-C30 QUALITY-OF-LIFE QUESTIONNAIRE THROUGHCOMBINED QUALITATIVE AND QUANTITATIVE ASSESSMENT OF PATIENT-OBSERVER AGREEMENT, Journal of clinical epidemiology, 50(4), 1997, pp. 441-450