1. Department of Surgery, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
2. Department of Abdominal Emergency and Pediatric Surgery, Hue Central Hospital, Hue, Vietnam
3. Anatomy and Surgical training Department, Hue University of Medicine and Pharmacy, Hue University, Hue, Vietnam
4. School of Medicine and Pharmacy, The University of Da Nang, Da Nang, Vietnam
5. Department of Radiology, Thien Hanh Hospital, Buon Ma Thuot, Vietnam