Farina Zameer, Quratulain Memon, Ferrukh Zehravi, Sumaiya Aziz, Nazia Mushtaq, Naeem Ahmed Soomro. “Prevalence of Vitamin-D Deficiency and Its Associations With Skin Color In First Trimester Pregnant Women”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 08, Oct. 2022, p. 713, doi:10.53350/pjmhs22168713.