1. Department of Immunology, School of Elementary Medicine, North China University of Science and Technology, Tangshan, People’s Republic of China
2. Department of Clinical Medicine, Tangshan Vocational and Technical College, Tangshan, People’s Republic of China
3. Department of Surgery, North China University of Science and Technology Affiliated Hospital, Tangshan, People’s Republic of China
4. Department of Clinical Laboratory, North China University of Science and Technology Affiliated Hospital, Tangshan, People’s Republic of China
5. Department of Clinical Laboratory, Tangshan Hongci Hospital, Tangshan, People’s Republic of China
6. Department of Clinical Laboratory, Tangshan Second Hospital, Tangshan, People’s Republic of China