Farah, D., R. Hameed, S. Khan, A. Razzaq, S. Aziz, and Z. Tahir. “Frequency of Vitamin D Deficiency and Associated Factors Among Pregnant Women Visiting Tertiary Care Hospital, Gujranwala, Pakistan”. Esculapio Journal of SIMS, vol. 19, no. 2, Aug. 2023, pp. 236-40, doi:10.51273/esc23.2519220.