1. Department of Geriatric Surgery, First Affiliated Hospital, Xi’an Jiaotong University, Xi’an, China
2. Shaanxi Joint Laboratory of Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an, China
3. First Affiliated Hospital, Xi’an Jiaotong University, Xi’an, China
4. School of Computing, Northwestern Polytechnical University, Xi’an, China
5. Department of Electronic and Electrical Engineering, Brunel University London, Uxbridge, U.K.