1. University of North Carolina at Chapel Hill Project-China; Guangzhou China
2. Department of Sociology; University of California; San Diego CA USA
3. School of Medicine; University of North Carolina at Chapel Hill; Chapel Hill NC USA
4. Dermatology Hospital; Southern Medical University; Guangzhou China
5. School of Media and Communication; Shenzhen University; Shenzhen China
6. Department of Public Health; Xi'an Jiaotong-Liverpool University; Suzhou China
7. School of Public Health; Rutgers University; New Brunswick NJ USA