Salman Khan, Javaria Amil, Husnain Hashim, Amanullah Khokhar, Dur E Huma, Tahir Mukhtar Syed. “Frequency of Vitamin Cobalamin Deficiency in Macrocystic Anemia Cases Reporting at Tertiary Care Hospital”. Pakistan Journal of Medical & Health Sciences, vol. 16, no. 06, Sept. 2022, p. 1074, doi:10.53350/pjmhs221661074.