1. Department of Psychiatry, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
2. Department of Psychiatry, School of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
3. School of Nursing, The State University of New York, University at Buffalo, New York, NY 14214-8013, USA
4. College of Professional Studies, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan