1. Department of Radiology, Hanoi Medical University, Hanoi 100000, Vietnam
2. Department of Radiology, Pham Ngoc Thach University of Medicine, Ho Chi Minh City 700000, Vietnam
3. Department of Radiology, Hai Phong International Hospital, Hai Phong 180000, Vietnam
4. Department of Radiology, Viet Duc Hospital, Hanoi 100000, Vietnam