1. Department of Psychiatry, PoJen General Hospital, Taipei, Taiwan; School of Health Care Administration, Taipei Medical University, Taipei, Taiwan
2. School of Public Health, Taipei Medical University, Taipei, Taiwan
3. Department of Psychiatry, Taipei Medical University, Taipei, Taiwan
4. School of Health Care Administration, Taipei Medical University, 250 Wu-Hsing Street, Taipei 110, Taiwan