Hu, Yue
Ye, Yong
Gong, Xue
Ran, Fei-fei
Article History
Accepted: 29 May 2019
First Online: 14 June 2019
Compliance with Ethical Standards
: This study was approved by the ethics committee of The First People’s Hospital of Shuangliu District, Chengdu. All study subjects gave informed consent prior to participating in the study.
: The authors declare that they have no competing interests.