Asala Adnan Otla, and Nadia Ahmed Saleh. “Estimation of the Level of Homocysteine and Vitamin B12 in Serum of Patients With Hypothyroidism”. Tikrit Journal of Pure Science, vol. 24, no. 1, Mar. 2019, pp. 70-73, doi:10.25130/tjps.v24i1.332.