Appraisal of awareness of medical staff about preoperative patient blood management in Saudi Arabia: a questionnaire-based study oleh Nora Y. Hakami, Nouf I. Almohammadi, Raghad A. Alqahtani, Nouf A. Alsayel, Raed I. Felimban, Salwa I. Hindawi, Yousif Mohammed Elmosaad, Hala Elsir Khair, Ahmed M. Hjazi, Hisham Ali Waggiallah, Elturabi Elsayed Elkhider, Mudathir Mohamedahmed Eltayeb