Document is current

Article History

Received: 31 March 2017

Accepted: 16 April 2018

First Online: 3 May 2018

Ethics approval and consent to participate

: This studies have been approved by the Medical Ethics Committee of Wuhan University and the number is 2013-043. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Oral or written informed consent was obtained from each patient before participation in the study.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.