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Authors
Liu, Linxin
Liu, Chaojie
Duan, Zhanqi
Pan, Jingping
Yang, Min
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Funding
Funding for this research was provided by:
China Medical Board [12-106] (12-106)
the Provincial Scientific Research Institute Achievement Transformation Project of Sichuan Province (15010112)
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Article History
Received: 17 January 2018
Accepted: 8 May 2019
First Online: 23 May 2019
Authors’ information
: None.
: Not applicable.This study was based on the second-hand data which came from the Medical Records Information System of Sichuan province. All data were de-identified and the manuscript does not contain any individual person’s data, so this study was exempted from ethics approval.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
