Funding for this research was provided by:
China Postdoctoral Science Foundation (2018M632285)
he General Program of National Natural Science Foundation of China (71173099 & 71473117)
the Key Project of the National Social Science Fund (16AZZ014)
Postdoctoral Research Funding Program of Jiangsu Province (1701078C)
Text and Data Mining valid from 2018-07-27
Received: 26 May 2018
Accepted: 12 July 2018
First Online: 27 July 2018
Ethics approval and consent to participate
: The data used in the present study is public. The data for lung cancer mortality is available on ExternalRef removed. The data for the per capita GDP of each province, and the population density of each province is retrieved from the China Statistical Yearbook which can be found at ExternalRef removed. The data for the number of general hospitals in each province and the per capita medical expenses of each province are derived from the China Health Statistics Yearbook which can be found at ExternalRef removed. The data for PM2.5 can be obtained at ExternalRef removed.
: Not applicable.
: The authors declare that they have no competing interests.
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