Khalid Al Khalifa1 • Ahmed Al Ansari1 • Abdul Rahim Alsayed1 • Claudio Violato2
1Department of General Surgery, Bahrain Defense Force Hospital, P.O. Box 28743,West Riffa, Bahrain
2Medical Education and Research Unit, Department of Community Health Sciences, Faculty of Medicine, University of Calgary, Calgary, Canada
Received 9 July 2013; Revised 5 September 2013; Accepted 5 September 2013