1 Department of Clinical Laboratory, The District People's Hospital of Zhangqiu, Jinan, Shandong, China.
2 Department of Health Ward, The District People's Hospital of Zhangqiu, Jinan, Shandong, China.
3 Department of Ultrasonography, The District People's Hospital of Zhangqiu, Jinan, Shandong, China.
4 Department of Clinical Laboratory, Sichuan Provincial Maternity and Child Health Care Hospital, The Affiliated Women's and Children's Hospital of Chengdu Medical College, Chengdu, Sichuan, China.
5 Department of Laboratory Medicine, Beijing Ludaopei Hospital, Beijing, China.