1. School of Science, Hunan University of Technology and Business, Changsha 410205, China
2. Key Laboratory of Statistical Learning and Intelligent Computing in Hunan Province, Changsha 410205, China
3. Department of Mathematics and Computer Science, University of North Carolina at Pembroke, Pembroke, NC 28372, USA
4. Department of Information Management, Chang Gung University, Taoyuan 33302, Taiwan
5. Clinical Trial Center, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
6. Department of Industrial Engineering and Management, Ming Chi University of Technology, New Taipei City 24301, Taiwan