Funding for this research was provided by:
National Natural Science Foundation of China (No. 71673052)
the China Scholarship Council (No. 201506105030)
Shanghai Pujiang Program of the Shanghai Municipal Human Resources and Social Security Bureau (No. 17PJC003)
Project of key disciplines construction from the Shanghai Disabled Persons' Federation (No. 2015-139)
the National Science & Technology Pillar Program during the Twelfth Five-year Plan Period (No. 2014BAI08B01)
The 111 Project (No. B16031)
a major project of the National Social Science Fund of China (No. 17ZDA078)
Text and Data Mining valid from 2020-04-15
Received: 4 May 2019
Accepted: 1 April 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: Ethical approval for the study was granted from the ethics committee of the School of Public Health at Fudan University (IRB#2017-09-0633). Written informed consents from all participants were obtained prior to survey.
: Not applicable.
: The authors declare that they have no competing interests<b>.</b>