Al-Hamdi, A., Al-Gahhafi, M., Al-Roshdi, S., Jaju, S., Al-Mamari, A. and Al Mahrezi, A. M. (2020) “Vitamin B12 Deficiency in Diabetic Patients on Metformin Therapy: A cross-sectional study from Oman”, Sultan Qaboos University Medical Journal, 20(1), pp. e90–94. doi: 10.18295/squmj.2020.20.01.013.