1. Institute of Public Health, School of MedicineNational Yang‐Ming University No. 115, Sec. 2, Li‐Nong Street., Beitou District Taipei City 112 Taiwan
2. Department of Intensive CareCheng‐Hsin Hospital No. 45, Cheng‐Hsin Street., Beitou District Taipei City 112 Taiwan
3. Institute of Hospital and Health Care Administration, School of MedicineNational Yang‐Ming University No. 115, Sec. 2, Li‐Nong Street., Beitou District Taipei City 112 Taiwan