Hovsepian, S., M. Amini, A. Aminorroaya, P. Amini, and B. Iraj. “Prevalence of Vitamin D Deficiency Among Adult Population of Isfahan City, Iran”. Journal of Health, Population and Nutrition, vol. 29, no. 2, June 2011, pp. 149-55, doi:10.3329/jhpn.v29i2.7857.