1. Methodologic challenges in the development of utility measures of health related quality of life in rheumatoid arthritis?;Bennet,1991
2. A critical review of cross national health-related quality of life instruments;Berzon;Quality of Life Newsletter,1993
3. Statistical methods for assessing agreement between two methods of clinical measurement;Bland;Lancet,1986
4. Comparison of three preference measurement methodologies in the evaluation of a functional status index;Bombardier,1982
5. Testing the validity of the Euroqol and comparing it with the SF36 health survey questionnaire;Brazier;Quality of Life Research,1993