1. Lawrence RC, Hochberg MC, Kelsey JL, McDuffie FC, Medsger TA, Felts WR et al. Estimates of the prevalence of selected arthritic and musculoskeletal diseases in the United States. J Rheumatol1989;16:427–41.
2. Lawrence JS, Bremner JM, Bier F. Osteoarthrosis: prevalence in the population and relationship between symptoms and X‐ray changes. Ann Rheum Dis1966;25:1–24.
3. Brady LP. Hip pain. Don't throw away the cane. Postgrad Med1988;83:89–90, 95–7.
4. Cyriax JH. Textbook of orthopaedic medicine. I: Diagnosis of soft tissue lesions, 8th edition. London: Balliere Tindall, 1982:43–69.
5. Lequesne M. La coxarathrose: critères de diagnostic: étiologie sur 200 cas; rôle de la dysplasie congénital. In: Peyron JG, ed. Epidemiology of osteoarthritis. Paris: Ciba Geigy, 1980:198–210.