Document Type : Original Article
Authors
1 cardiothoracic surgery department ,Faculty of medicine, Benha university ,Benha ,Egypt .
2 cardiothoracic surgery department ,faculty of medicine ,Benha university ,Benha ,Egypt
3 Anatomy and embryology department, Faculty of medicine, Benha university ,Benha, Egypt
4 community department, Faculty of Mathematic science and informatics, university of Khartoum, Khartoum ,Sudan .
Abstract
Keywords
Main Subjects