Authors : Hai Nhu Phung (Institute of Information Technology, AMST, Hanoi, Vietnam); Thanh Nguyen Chi and Trung-Kien Tran (Institute of Information Technology, AMST, Vietnam); Cuong Danh Tran (National Hospital of Obstetrics and Gynecology, Vietnam); Hang Thi Thu Truong (Institute of Information Technology, AMST, Vietnam); Trang Thi Nguyen and Huy Duc Do (Hanoi Medical University, Vietnam)