B. Shahzad, M. Shahzad, M. J. Khan, S. Khan, and H. Bibi, “PLASMA VITAMIN D STATUS AND ASSOCIATED FACTORS AMONG PREGNANT WOMEN OF PESHAWAR, KHYBER PAKHTUNKHAWA, PAKISTAN: A PILOT STUDY”, Khyber Med Univ J, vol. 11, no. 4, pp. 226–30, Dec. 2019.