1. Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China.
2. Department of Laboratory Medicine, Xiangya School of Medicine, Central South University, Changsha, Hunan, People's Republic of China.
3. Department of Clinical Laboratory, The First People's Hospital of Changde City, Changde, Hunan, People's Republic of China.