Liu, Yuanqi
Ren, Wei
Bai, Yang
Wan, Lihong
Sun, Xiaodong
Liu, Yin
Xiong, Wenbi
Zhang, Yuan-Yuan
Zhou, Liming
Article History
Received: 20 September 2017
Accepted: 6 January 2018
First Online: 19 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Ethics Committee of Sichuan University, Chengdu, China with the reference number: K2016040.