1. Department of Emergency, Qingdao Women and Children’s Hospital, Qingdao City, Shandong Province, China
2. Department of Internal Medicine, Qingdao University Staff Hospital, Qingdao City, Shandong Province, China
3. Department of Infection, Qingdao Women and Children’s Hospital, Qingdao City, Shandong Province, China
4. Department of Pediatrics, Qingdao Women and Children’s Hospital, Qingdao City, Shandong Province, China