Zahra Wasim, Faiqa Chughtai, Sana Yousaf, Tahira Riaz, Tabassum Muzaffar, Adiba Akhtar. Burden of Vitamin D Deficiency and its Related Risk Factors in Early Pregnancy. Pakistan Journal of Medical & Health Sciences [Internet]. 2022 May 13 [cited 2024 Nov. 21];16(04):313. Available from: https://pjmhsonline.com/index.php/pjmhs/article/view/826