Funding for this research was provided by:
National Natural Science Foundation of China (81572654)
Science, Technology and Innovation Commission of Shenzhen Municipality (JCYJ20150403091443286 and SZBC2017023, JCYJ20160428173933559, JCYJ20150403091443303)
Text and Data Mining valid from 2019-04-29
Received: 24 November 2018
Accepted: 9 April 2019
First Online: 29 April 2019
Ethics approval and consent to participate
: All patients were informed in accordance with the ethical guidelines of Peking University (Protocol No.37923/2-3-2012). This study was approved by the Ethics Committee of Peking University Health Science Center (IRB00001053–08043).
: 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.