“Prevalence of Vitamin D and Vitamin B12 Deficiency in Patients reporting to the West Bank governmental hospitals in the period between January 2015 and December 2018” (2021) Al-Quds Journal for Natural Sciences, 1(1). Available at: https://aquja.alquds.edu/index.php/science/article/view/11 (Accessed: 27 April 2025).