1. Institute of Social Medicine and Health Systems Research, Medical Faculty, Otto Von Guericke University, Magdeburg, Germany
2. Department of Infection Control, Dongguan Tung Wah Hospital, Sun Yat-sen University, Dongguan City, Guangdong Province, China
3. Dongguan Nosocomial Infection Control and Quality Improvement Centre, Dongguan City, Guangdong Province, China
4. Institute for Global Health, Faculty of Pop Health Sciences, University College London, UK
5. Center for Global Health, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China
6. Laboratory of Biostatistics, Division of Social Medicine, School of Medicine, University of Crete, Heraklion, Greece