1. Tsaotun Psychiatric Centre; Ministry of Health and Welfare; Nan-Tou Taiwan
2. College of Medicine; China Medical University; Taichung Taiwan
3. Centre for Drug Abuse & Addiction; China Medical University Hospital; Taichung Taiwan
4. Division of Cardiology; Department of Internal Medicine; Kaohsiung Medical University Chung-Ho Memorial Hospital; Kaohsiung City Taiwan
5. Department of Psychiatry; Taichung Veterans General Hospital; Taichung Taiwan
6. Department of Psychiatry; Chung Shan Medical University; Taichung Taiwan
7. Department of Psychiatry; Chung Shan Medical University Hospital; Taichung Taiwan
8. National Addiction Centre, Institute of Psychiatry; King's College London; London UK