Text and Data Mining valid from 2018-06-01
Received: 8 January 2018
Accepted: 10 May 2018
First Online: 1 June 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Ethics Committee of the Daping Hospital of Third Military Medical University. The Committee and University approved the informed consent forms and approved the data related to participant health and health-related outcomes.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.