1. Department of Nursing, Xi’an Jiaotong University Health Science Center, 76 Yanta West Road, Xi’an 710061, China
2. School of Public Health, The University of Hong Kong, 7 Sassoon Road, Pok Fu Lam, Hong Kong, China
3. School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
4. School of Public Health, Xi’an Jiaotong University Health Science Center, 76 Yanta West Road, Xi’an 710061, China