Department of Infectious Disease Qingdao Municipal Hospital Dalian Medical University Dalian Liaoning China;
Qingdao City Shinan District Centers for Disease Control and Prevention Qingdao Shandong China;
Clinical Research Center Qingdao Municipal Hospital Qingdao Shandong China;
Qingdao City Shinan District Centers for Disease Control and Prevention Qingdao Shandong China;
Clinical Research Center Qingdao Municipal Hospital Qingdao Shandong China;
Department of Infectious Disease Qingdao Municipal Hospital Dalian Medical University Dalian Liaoning China;
Department of Infectious Disease Qingdao Municipal Hospital Dalian Medical University Dalian Liaoning China;
Digestive Disease Key Laboratory of Qingdao Qingdao Shandong China;