Yang, Libo
Zhong, Xiaorong
Pu, Tianjie
Qiu, Yan
Ye, Feng
Bu, Hong
Article History
Received: 30 September 2017
Accepted: 4 February 2018
First Online: 7 March 2018
Ethics approval and consent to participate
: This study was approved by the institutional Ethics Committee of the West China Hospital.
: Not applicable.
: The authors declare that they have no competing interests.
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