Affiliation: | 1.Department of Surgery, Clinical Research, Trauma and Vascular Surgery, Hamad General Hospital, P.O Box 3050, Doha, Qatar ;2.Department of Clinical Medicine, Weill Cornell Medical College, Doha, Qatar ;3.Department of Surgery, Trauma Surgery, Hamad General Hospital, Doha, Qatar ;4.Department of Surgery, Biostatistician, Hamad General Hospital, Doha, Qatar ; |