1. School of Nursing, University of California Los Angeles, Los Angeles, CA, USA
2. Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA, USA
3. Beijing, Ditan Hospital, Capital Medical University, Beijing, People’s Republic of China
4. Shanghai Public Health Clinical Center, Fudan University, Shanghai, People’s Republic of China
5. School of Nursing, John Hopkins University, Baltimore, MD, USA
6. School of Nursing, Yale University, Orange, CT, USA
7. School of Public Health, Yale University, New Haven, CT, USA
8. School of Nursing, National Cheng Kung University, Tainan, Taiwan
9. AIDS Unit, Beijing, Ditan Hospital, Capital Medical University, Beijing, People’s Republic of China