A. B. Kale, M. Haseeb, D. Jain, B. Jain, and A. Deshmukh, “Sero-prevalence of vitamin D deficiency among pediatric subjects visiting central railway hospital, Byculla, Mumbai, India: a cross sectional study”, Int J Contemp Pediatr, vol. 3, no. 2, pp. 461–463, Dec. 2016.