 
								Document Type : Preliminary preprint short reports of original research
Authors
1 Department of Surgery , faculty of medicine , Alexandria university
2 Department of Critical Care, Faculty of Medicine, Alexandria University
3 Department of Emergency Medicine3, Faculty of Medicine, Alexandria University
4 Department of Biomedical Informatics and Medical Statistics, Medical Research Institute, Alexandria University.
5 Department of Emergency Medicine, Faculty of Medicine, Alexandria University.
Abstract
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