Funding for this research was provided by:
National Natural Science Foundation of China (71473047)
Text and Data Mining valid from 2018-09-19
Received: 19 September 2017
Accepted: 30 August 2018
First Online: 19 September 2018
: Jie Bai was a PhD student at the School of Public Health, Fudan University from September 2014 to July 2017 and is a staff member of the Pudong Institute for Health Development.
: This study was approved by the Institutional Review Board (IRB), School of Public Health, Fudan University (IRB#2014–03-0502). The patient consent was waived by the IRB because we used chart reviews of medical records in this study, and the data extracted from the medical records did not include any information identifying patients.
: Since we used chart reviews of medical records in this study, and the data extracted from the medical records did not include any information identifying patients, no informed consent from patients was required in this study.
: The authors declare that they have no competing interests.
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