1 Clinical Laboratory, Longgang District Maternity and Child Healthcare Hospital, Guangzhou Medical University, Shenzhen, China; Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.
2 Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.
3 Clinical Laboratory, Longgang District Maternity and Child Healthcare Hospital, Guangzhou Medical University, Shenzhen, China; Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China. Electronic address: zzw6248@126.com.