Liu, Jian
Shen, Pingyan
Ma, Xiaobo
Yu, Xialian
Ni, Liyan
Hao, Xu
Wang, Weiming
Chen, Nan
Article History
Received: 21 December 2016
Accepted: 31 July 2017
First Online: 23 June 2018
Compliance with ethics guidelines
: Jian Liu, Pingyan Shen, Xiaobo Ma, Xialian Yu, Liyan Ni, Xu Hao, Weiming Wang, and Nan Chen declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. This work was approved by the Institutional Review Board of Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (No. 201029), and was in accordance with the principle of the <i>Helsinki Declaration II</i>.