1. School of Computer Science and Technology, University of Petroleum, Qingdao, Shandong, China
2. Heart Center, Women and Children’s Hospital, Qingdao, Shandong, China
3. Department of Ultrasound, Women and Children’s Hospital, Qingdao, Shandong, China
4. Department of Computer Science and Engineering, National Institute of Technology, Patna, India
5. Department of Game Design, Faculty of Arts, Uppsala University, Uppsala, Sweden