M. R. . Rahamn, Q. M. . Uddin Ahmed, M. A. . Rahim, C. A. . Sami, H. I. . Ahmad, and M. N. . Hasan, “Correlation of Long Term Proton Pump Inhibitors (PPI) Use with Iron and Vitamin B12 Deficiency Anaemia”, Bangladesh Med J, vol. 50, no. 1, pp. 27–32, Jan. 2021.