1. Department of Internal Medicine University of Medicine and Pharmacy at Ho Chi Minh City Ho Chi Minh City Vietnam
2. Department of Radiology Children's Hospital 2 Ho Chi Minh City Vietnam
3. Department of Radiology Pham Ngoc Thach University of Medicine Ho Chi Minh City Vietnam
4. Department of Radiology Ha Noi Medical University Ha Noi Vietnam
5. Department of Respirology Children's Hospital 2 Ho Chi Minh City Vietnam