Funding for this research was provided by:
Project Management Office of the Cause and Control of Atmospheric Heavy Pollution (DQGG0401-01)
Received: 29 July 2019
Accepted: 20 September 2019
First Online: 7 November 2019
Ethics approval and consent to participate
: This is an observational, non-interventional database study, re-utilizing the data from the Global Burden of Diseases, Injuries, and Risk Factors 2017 study for the purpose of addressing a research question. The need for ethics approval and consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.