References
- Kellgren J H, Lawrence J S, Aitken-Swan J. Rheumatic complaints in an urban population. Ann Rheum Dis 1953; 12: 5–15
- De Jongh B M, van Romunde L KJ, Valkenburg H, de Lange G G, van Rood J J. Epidemiological study of HLA and GM in rheumatoid arthritis and related symptoms in an open Dutch population. Ann Rheum Dis 1984; 43: 613–9
- Valkenburg H A, Haanen H CM. The epidemiology of low back pain. Sympo-sion of idiopathic low back pain, A A White, S L Gordon. Mosby, New York 1982; 9–21
- Van Saase J LCM, van Romunde L KJ, Cats A, Vandenbroucke J P, Valkenburg H A. Epidemiology of osteoarthritis: Zoetermeer survey. Comparison of radiological osteoarthritis in a Dutch population with that in 10 other populations. Ann Rheum Dis 1989; 48: 271–80
- Van Hemert A M. Epidemiology of osteoporosis and prediction of fractures. Medical Thesis, Rotterdam 1989
- Valkenburg H A. Epidemiologic consideration of the geriatric population. Gerontology 1988; 34((suppl. 1))2–10
- Tugwell P, Bennett K J, Sackett D L, Haynes R B. The measurement iterative loop: a framework for the critical appraisal of need, benefits and costs of health interventions. J Chr Dis 1985; 38: 339–51