1. Department of Gastroenterology and Hepatology, 108 Military Central Hospital, Hanoi, Vietnam
2. Department of Medical Oncology, 108 Military Central Hospital, Hanoi, Vietnam
3. Department of Radiation Oncology and Radiosurgery, 108 Military Central Hospital, Vietnam
4. Department of Oncology, Hanoi Medical University Hospital, Vietnam
5. Department of Internal Medicine, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Republic of Korea