1. Department of Nursing, Taipei Veterans General Hospital, No. 201, Section 2, Shipai Road, Taipei 112, Taiwan
2. Department of Health Promotion and Health Education, National Taiwan Normal University, No. 162, Section 1, Heping E. Road, Taipei 106, Taiwan
3. Department of Anesthesiology, Taipei Veterans General Hospital and National Yang-Ming University, No. 201, Section 2, Shipai Road, Taipei 112, Taiwan