1 Tianjin Life Science Research Center, Department of Pathogen, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China; Department of Clinical Laboratory of Guangdong Women and Children Hospital, Guangzhou, China.
2 Tianjin Life Science Research Center, Department of Pathogen, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China; Department of Clinical Laboratory of Guangdong Women and Children Hospital, Guangzhou, China. Electronic address: htang2002@yahoo.com.