Vrinda Goyal, & Mukta Agrawal. (2019). Chronic non-specific musculoskeletal pain – prevalence, assessment and association with serum vitamin D in adults. World Journal of Pharmaceutical Sciences, 7(4), 31–37. Retrieved from https://wjpsonline.com/index.php/wjps/article/view/chronic-non-specific-musculoskeletal-pain-vitamin-d