1. Mackay Junior College of Nursing, Taipei, Taiwan.
2. Department of Infectious Disease, Taipei Veterans General Hospital, Taipei, Taiwan.
3. Institute of Public Health, National Yang Ming-University, Taipei, Taiwan.
4. Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan.
5. Sexually Transmitted Disease Control Center, Taipei, Taiwan.
6. Institute of Clinical Nursing, National Yang-Ming University, Taipei, Taiwan.