1. College of Management and Economics, Tianjin University, Tianjin, People’s Republic of China
2. Department of Mechanical and Industrial Engineering, Norwegian University of Science and Technology, Trondheim, Norway
3. School of Management and Engineering, Nanjing University of Finance and Economics, Nanjing, People’s Republic of China
4. Department of Endocrinology, Tianjin Children’s Hospital, Tianjin, People’s Republic of China