1. Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
2. Institute for Emergency and Disaster Medicine, Sichuan Provincial People’s Hospital, Sichuan Academy of Medical Sciences, Chengdu, People’s Republic of China
3. School of Medicine, University of Electronic Science and Technology, Chengdu, People’s Republic of China
4. Aibai Culture and Education Center, Chengdu, People’s Republic of China
5. Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA