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2. An articular index for the assessment of osteoarthritis;Doyle;Ann Rheum Dis,1981
3. European guidelines for clinical trials of new antirheumatic drugs;Lequesne;Eular Bull,1980
4. Arthrose de la hanche et du genou Criteres de diagnositic Indices de mesure de la douleur, de la fonction et du resultat therapeutique;Lequesne,1985
5. Verbal pain descriptors used by patients with arthritis;Wagstaff;Ann Rheum Dis,1985