College of Computer Science and Technology, Dalian University of Technology, Dalian 116024, China.|College of Computer Science and Technology, Dalian University of Technology, Dalian 116024, China.|College of Computer Science and Technology, Dalian University of Technology, Dalian 116024, China.|Beijing Institute of Health Administration and Medical Information, Beijing 100850, China.|Beijing Institute of Health Administration and Medical Information, Beijing 100850, China.|College of Computer Science and Technology, Dalian University of Technology, Dalian 116024, China.|College of Computer Science and Technology, Dalian University of Technology, Dalian 116024, China.