1Department of Microbiology, Immunology and Parasitology, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia, E-mail: amarebem6@gmail.com
2Department of Surgery, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia, E-mail: amarebem6@gmail.com
3Department of Pediatrics, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia, E-mail: amarebem6@gmail.com
4Department of Gynecology and Obstetrics, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia, E-mail: amarebem6@gmail.com