1. Department of NursingNational Taiwan University, College of Medicine and NTU HospitalTaiwan
2. NSW Hospital Infection, Epidemiology & Surveillance Unit, School of Health Services Management, The University of New South WalesAustralia
3. Institute of Occupational Safety and Health, Council of Labor Affairs, Executive YuanTaiwan
4. Department of Internal MedicineUniversity of Virginia Health SystemUSA