Chhetri, N., Chhetri, A., Bhattacharya, G.C., Mukherjee, A., Sen, S. and Kumar, A. 2017. Vitamin D status in outpatient department patients: a retrospective study. International Journal of Research in Medical Sciences. 4, 6 (Jan. 2017), 2276–2280. DOI:https://doi.org/10.18203/2320-6012.ijrms20161799.