The relationship between preoperative anemia and length of hospital stay among patients undergoing orthopedic surgery at a teaching hospital in Ethiopia: a retrospective cohort study. - Endeshaw, Amanuel Sisay; Diress, Fikadu Tadesse; Endeshaw, Melatmariam Sisay; Kefale, Workineh Mengesha; Addisu, Biniyam Teshome; Demilie, Atalay Eshetie; Kumie, Fantahun Tarekegn (Perioperative Medicine, 2024)