“Studying and Improving Treatment of Calprotectin, Helicobacter Pylori and Interleukin-6 in Blood of Patients with Covid-19”, Journal of Pharmaceutical Negative Results, pp. 2387–2393, Nov. 2022, Accessed: Jun. 19, 2026. [Online]. Available: https://www.pnrjournal.com/index.php/home/article/view/3805