About the Authors

Qi Kang

Affiliation School of Public Health, Fudan University, Shanghai 200032, P. R. China

Gang Chen

gchen@shmu.edu.cn

Affiliations School of Public Health, Fudan University, Shanghai 200032, P. R. China, China Research Center on Disability Issues at Fudan University, Shanghai 200032, P. R. China

Jun Lu

Affiliations School of Public Health, Fudan University, Shanghai 200032, P. R. China, China Research Center on Disability Issues at Fudan University, Shanghai 200032, P. R. China

Huijiong Yu

Affiliation Department of Rehabilitation, Shanghai Disabled Persons’ Federation, Shanghai 200126, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: QK GC JL. Performed the experiments: QK GC JL. Analyzed the data: QK GC JL HY. Contributed reagents/materials/analysis tools: QK GC JL HY. Wrote the paper: QK GC JL HY.