Al-Amoush, Adeeb, Qasem Abu Shaqra, and Rania Al-Groom. 2016. “Evaluation of Vitamin B12 Serum Level in a Group of Jordanian Patients With Type 2 Diabetes Mellitus”. Pakistan Journal of Nutrition 15 (6): 561–564. https://doi.org/10.3923/pjn.2016.561.564.