Gan, Fengping
Jiang, Jianzhong
Xie, Zhaolin
Huang, Shengbin
Li, Ying
Chen, Guoping
Tan, Haitao
Article History
Received: 5 December 2017
Accepted: 11 July 2018
First Online: 7 August 2018
Competing interest
: The authors declared that they have no competing interest.
: The study was performed according to the ethic committee of Guigang City People’s Hospital of GuangxiProvince, and a completion of the ethics application at 11 October 2017. Informed consent was waived because of the retrospective design of this study that did not involve any additional risk for patients. Patients who were eligible to participate received a letter with the questionaires which informed them about the purpose of the study. The patients who gave their informed consent returned the letter and the corresponding questionaires.
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