Zhang, Jin-Xing http://orcid.org/0000-0003-1561-100X
Wang, Bin http://orcid.org/0000-0002-4262-2129
Liu, Sheng http://orcid.org/0000-0002-4058-4413
Zu, Qing-Quan http://orcid.org/0000-0001-7359-0791
Shi, Hai-Bin http://orcid.org/0000-0003-1293-5789
Article History
Received: 3 July 2018
Accepted: 30 October 2018
First Online: 8 November 2018
Compliance with Ethical Standards
:
: No conflict of interest to declare.
: Study protocol followed the guidelines of the World Medical Association Declaration of Helsinki and was approved by the Ethics Committee of our institution (Ethical review no. 2017-SR-307). For this retrospective study, formal consent was not required.