Liu, Limei
Wang, Yi
Liu, Ju
Liu, Wu
Article History
Received: 16 May 2018
Accepted: 24 October 2018
First Online: 7 November 2018
Ethics approval and consent to participate
: This study followed the tenets of the Declaration of Helsinki, and was approved by the ethical committee of the Beijing Tongren Hospital (No.: TRECKY-012). Informed consent was obtained from each patient before the study.
: Not applicable.
: The authors declare that they have no competing interests.
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