Zhu, Qiang
Yue, Yan
Zhu, Lichen
Cui, Jiewei
Zhu, Minghui
Chen, Liangan
Yang, Zhen
Liang, Zhixin
Article History
Received: 14 March 2018
Accepted: 21 August 2018
First Online: 3 September 2018
Ethics approval and consent to participate
: The local institutional review board approved this study. For this type of study, formal consent is not required in our hospital.
: 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.