Zahra Wasim, Faiqa Chughtai, Sana Yousaf, Tahira Riaz, Tabassum Muzaffar, Adiba Akhtar. (2022). Burden of Vitamin D Deficiency and its Related Risk Factors in Early Pregnancy. Pakistan Journal of Medical & Health Sciences, 16(04), 313. https://doi.org/10.53350/pjmhs22164313