Hussain, Nadia, et al. “LEVELS OF VITAMIN D AND VITAMIN D PATHWAY GENE POLYMORPHISMS IN ADULTS: RESULTS BASED ON RURAL AGRICULTURE WORKERS IN PUNJAB PROVINCE OF PAKISTAN”. Progress in Nutrition, vol. 22, no. 2, June 2020, pp. 485-92, https://doi.org/10.23751/pn.v22i2.8180.