Tekdos Demircioglu, D.; Karabulut, D.; Kasapoglu, P.; Canbolat Unlu, E.; Kart Yasar, K.; Isıksacan, N. The Effect of Vitamin K1 and Vitamin K2 on Mortality Rate and Disease Severity in COVID-19 Patients: An Observational Study: Vitamin K and COVID-19 Outcomes. J Surg Med 2025, 9, 149-153.