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BMJ (Clinical Research Ed.)|September 9, 1989
Sample size and power for comparing two or more treatment groups in clinical trialsS J Day, D F GrahamCommunity Dentistry and Oral Epidemiology|October 1, 1989
Life-span of amalgam restorations in primary molars: some results and comments on statistical analysesF S Wong, S J DayJournal of the Royal Society of Medicine|March 31, 2000
Hospital referrals for low back pain: more coherence neededA J Silman, M I Jayson, A C Papageorgiou, et al.British Journal of Rheumatology|January 1, 1994
High prevalence of joint laxity in West AfricansF N Birrell, A O Adebajo, B L Hazleman, et al.Disease Markers|June 1, 1988
Evidence for similarity in testosterone levels in haplotype identical brothersT D Spector, W E Ollier, L A Perry, et al.Arthritis and Rheumatism|March 23, 2000
The association between chronic widespread pain and mental disorder: a population-based studyS Benjamin, S Morris, J McBeth, et al.The Journal of Rheumatology|December 19, 1998
The performance of the 1987 ARA classification criteria for rheumatoid arthritis in a population based cohort of patients with early inflammatory polyarthritis. American Rheumatism AssociationB J Harrison, D P Symmons, E M Barrett, et al.Annals of the Rheumatic Diseases|August 1, 1997
Radiographic osteoarthritis of the knee classified by the Ahlbäck and Kellgren & Lawrence systems for the tibiofemoral joint in people aged 35-54 years with chronic knee painI F Petersson, T Boegård, T Saxne, et al.Annals of the Rheumatic Diseases|May 1, 1997
Prevalence of shoulder pain in the community: the influence of case definitionD P Pope, P R Croft, C M Pritchard, et al.Maturitas|October 9, 1999
Does the presence of postmenopausal symptoms influence susceptibility to vertebral deformity? European Vertebral Osteoporosis Study (EVOS) GroupV Scoutellas, T W O'Neill, M Lunt, et al.Pageof 29