D. Farah, 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 - JSIMS, vol. 19, no. 2, pp. 236–240, Aug. 2023.