1. Department of Nursing, New Taipei Municipal TuCheng Hospital, Chang Gung Medical Foundation, New Taipei City 236, Taiwan
2. Department of Nursing, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan
3. Department of Nursing, Taipei Medical University, Taipei 110, Taiwan
4. Department of Nursing, Chang Gung Memorial Hospital at Keelung, Keelung 20401, Taiwan
5. Usher Institute, University of Edinburgh, Edinburgh EH8 9AG, UK