H. A. Obaid, N. A. alkhudhur Salman, I. J. Mohammad, H. B. Saadon, and A. H. Jabbar, “Evaluation of Serum Vitamin D3, PTH, Calcium and Iron Levels in Patients with H. pylori Infection”, acopen, vol. 9, no. 2, p. 10.21070/acopen.9.2024.10386, Dec. 2024.