Serum Hypoxia-Inducible Factor 1 Alpha Levels Decrease in Patients with COVID-19: A Case-Control Study. - Ciftci, Handan; Sabirli, Ramazan; Koseler, Aylin; Canacik, Omer; Karsli, Emre; Ercin, Dogan; Tutuncu, Emin Ediz; Kurt, Ozgur (COVID, 2026)