Department of Pediatrics;
First Hospital;
Jilin University;
Changchun 130021;
Jilin Province;
China;
Department of Histology and Embryology;
Bethune Medical School;
Jilin University;
Changchun 130021;
Jilin Province;
China;
Central Laboratory;
First Hospital;
Jilin University;
Changchun 130021;
Jilin Province;
China;