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Arthritis and Rheumatism|April 3, 2008
The influence of age at symptom onset and length of followup on mortality in patients with recent-onset inflammatory polyarthritisSophia M Naz, Tracey M Farragher, Diane K Bunn, et al.
Pediatrics|April 3, 2003
Predictors of low back pain in British schoolchildren: a population-based prospective cohort studyGareth T Jones, Kath D Watson, Alan J Silman, et al.
The Journal of Rheumatology|December 17, 2003
Development of resource-use and expenditure questionnaires for use in rheumatology researchNicola J Cooper, Miranda Mugford, Deborah P M Symmons, et al.
American Journal of Epidemiology|January 21, 2009
Different methods of balancing covariates leading to different effect estimates in the presence of effect modificationMark Lunt, Daniel Solomon, Kenneth Rothman, et al.
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