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Authors
Tian, Fangfang
Shen, Guohua
Deng, Yunfu
Diao, Wei
Jia, Zhiyun
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (81571637, 81271532)
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Article History
Received: 20 October 2016
Revised: 13 March 2017
Accepted: 21 March 2017
First Online: 5 May 2017
Compliance with ethical standards
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: The scientific guarantor of this publication is Zhiyun Jia.
: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
: This study has received funding by the National Natural Science Foundation (Grant Nos. 81571637 and 81271532).
: Guanjian Liu (The Chinese Cochrane Center, West China Hospital, Sichuan University, PR China) kindly provided statistical advice for this manuscript.
: Institutional review board approval was not required because we only performed data analysis based on the published studies.
: Written informed consent was not required for this study because it is a meta-analysis based on the studies that have been published.
: retrospective, diagnostic or prognostic study, performed at one institution.
