Department of Anaesthesiology Institute of Anaesthesiology and Critical Care Medicine Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 Hubei Province China;
Poznan University of Medical Science Poznan 60-781 Poland;
Department of Anesthesiology Li Ka Shing Faculty of Medicine The University of Hong Kong Hong Kong China;
Department of Anesthesiology Affiliated Hospital of Guangdong Medical University Zhanjiang 524000 Guangdong Province China;
Department of Anesthesiology Renmin Hospital of Wuhan University Wuhan 430060 Hubei Province China;
Department of Anaesthesiology Institute of Anaesthesiology and Critical Care Medicine Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 Hubei Province China;
Department of Anaesthesiology Institute of Anaesthesiology and Critical Care Medicine Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430022 Hubei Province China;
SARS-CoV-2; COVID-19; Transmission; Infection; Nosocomial; Risk;