1. Institute of International Travel Health Care, Shenzhen Academy of Inspection and Quarantine, Shenzhen, 518033, P.R. China
2. Shenzhen Children’s Hospital, Shenzhen, 518038, P.R. China
3. Guangdong Medical college, Zhanjiang, 524023, P.R. China
4. School of public health, Nantong University, Nantong, 226019, P.R. China
5. Medical Inspection center, Zhujiang Hospital, Nan Fang Medical University, Guangzhou, 510280, P.R. China