Riffat Naeem, Farah Rafique, Hamail Amin, Andleeb Badar, Hira Sohail, Farhat Ijaz. “Evaluating Deficiency of Vitamin B12 and Risk Factors in Healthy Infants”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 03, May 2022, p. 1120, doi:10.53350/pjmhs221631120.