Calcium and vitamin D supplementation and incident rheumatoid arthritis: the Women's Health Initiative Calcium plus Vitamin D trial.
Racovan M, Walitt B, Collins CE, Pettinger M, Parks CG, Shikany JM, Wactawski-Wende J, Manson JE, Moreland L, Wright N, Jackson R, Howard BV. Calcium and vitamin D supplementation and incident rheumatoid arthritis: the Women's Health Initiative Calcium plus Vitamin D trial. Rheumatol Int. 2012 Dec; 32(12):3823-30.