1. Anatomy and Surgical Training Department, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
2. Department of Gastrointestinal Surgery, Hue University of Medicine and Pharmacy Hospital, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
3. Pathology Department, Hue University of Medicine and Pharmacy Hospital, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
4. Department of Histology, Embryology, Pathology and Forensic Medicine, University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
5. Pathology Department, Hue Central Hospital, Hue City, Vietnam
6. Faculty of Public Health, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam
7. Department of Surgery, Hue University of Medicine and Pharmacy, Hue University, Hue City, Vietnam