Vaidya, B., S. Nakarmi, A. Chaudhary, P. Batajoo, and N. Rajbhandari. “Study of Hypovitaminosis D As a Cause of Chronic Widespread Pain in Patients Presenting to Rheumatology Clinic”. Journal of Advances in Internal Medicine, vol. 3, no. 1, July 2014, pp. 1-4, doi:10.3126/jaim.v3i1.10694.