Funding for this research was provided by:
National Nature Science Foundation of China (81302443)
National key research and development program (2016YFC1000504)
Text and Data Mining valid from 2018-09-04
Received: 4 December 2017
Accepted: 29 August 2018
First Online: 4 September 2018
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of Harbin Medical University for Medical Sciences (HMUIRB2012007). All experiments on human subjects were conducted in accordance with the Declaration of Helsinki. All procedures were carried out with the adequate understanding and written informed consent from the guardian of each participant prior to the study.
: 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.