Improving physical activity in arthritis clinical trial (IMPAACT): study design, rationale, recruitment, and baseline data.
Chang RW, Semanik PA, Lee J, Feinglass J, Ehrlich-Jones L, Dunlop DD. Improving physical activity in arthritis clinical trial (IMPAACT): study design, rationale, recruitment, and baseline data. Contemp Clin Trials. 2014 Nov; 39(2):224-35.