Study of vitamin D status of rheumatoid arthritis patients Rationale and design of a cross-sectional study by the osteoporosis and metabolic bone diseases study group of the Italian Society of Rheumatology (SIR)
The fundamental role of Vitamin D has been long known in regulating calcium homeostasis and bone metabolism.An increased contribution of Vitamin D was recently described in association with a lower incidence of Rheumatoid Arthritis (RA).This must not be surprising, as the immunomodulating effects of Vitamin D are clear, which have been attributed p