Guang, Yang http://orcid.org/0000-0001-9381-7324
He, Wen
Luo, Yukun
Zhang, Hongxia
Zhang, Yukang
Ning, Bin
Yu, Tengfei
Article History
Received: 4 November 2018
Accepted: 31 January 2019
First Online: 13 February 2019
Ethics approval and consent to participate
: The protocol was approved by the Institutional Review Board of the Beijing Tian Tan Hospital Ethics Committee and the Chinese PLA General Hospital Ethics Committee. All subjects provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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