Shamsdin, S. A., Akrami, H., Nikmanesh, Y., Samani, H., & Fattahi, M. J. "Investigation of Serum PIVKA-II Levels in Patients with Helicobacter pylori Infection and Normal Group", Iranian Journal of Colorectal Research, 11, 2, 2023, 79–82. doi: 10.30476/acrr.2023.99923.1184