1. Hanoi Metropolitan University of Vietnam, 98 Duong Quang Ham, Quan Hoa, Cau Giay, Hanoi 100000, Vietnam
2. University of Science,Vietnam National University-Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi 100000, Vietnam
3. Hanoi National University of Education, 136 Xuan Thuy, Dich Vong Hau, Cau Giay, Hanoi 100000, Vietnam
4. Duy Tan University, 254 Nguyen Van Linh, Thac Gian, Thanh Khe, Da Nang 550000, Vietnam
5. Ha Dong Genaral Hospital, 2 Be Van Dan, Quang Trung, Ha Dong, Hanoi 100000, Vietnam
6. 115 Nghe An General Hospital, 40 Xo Viet Nghe Tinh, Vinh, Nghe An 460000-470000, Vietnam