References
- Proceedings of the international conference on the measurement of quality of life as an outcome in clinical trials. Controlled Clin Trials 1991; 12(4)
- Wiklund I, Romanus B, Hunt S M. Self-assessed disability in patients with arthrosis of the hip joint. Int Disabil Studies 1988; 10: 159–63
- Quality of life assessments in clinical trials, B Spilker. Raven Press, New York 1990