1. Department of Pediatrics, Can Tho University of Medicine and Pharmacy, Can Tho City 90000, Vietnam
2. Department of Pediatrics, Hanoi Medical University, Hanoi 100000, Vietnam
3. Laboratory of Nam Khoa Biotek Company, International Research of Gene and Immunology Institute, Ho Chi Minh City 700000, Vietnam
4. Department of Nursing and Medical Technology, Can Tho University of Medicine and Pharmacy, Can Tho City 90000, Vietnam