1. Department of Scientific Research, Youjiang Medical College for Nationalities, Baise, Guangxi, People's Republic of China.
2. Department of Pediatrics, The Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, Guangxi, People's Republic of China.
3. Department of Immunology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu, Sichuan, People's Republic of China.
4. Center of Scientific Laboratory, Youjiang Medical College for Nationalities, Baise, Guangxi, People's Republic of China.