Liu, Qingxing
Cheng, Yuejuan
Zang, Jie
Sui, Huimin
Wang, Hao
Jacobson, Orit
Zhu, Zhaohui
Chen, Xiaoyuan http://orcid.org/0000-0002-9622-0870
Article History
Received: 7 July 2019
Accepted: 10 September 2019
First Online: 12 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures involving human participants in studies were in accordance with the ethical standards of the Institute Review Board of Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, and with the principles of the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Informed consent was obtained from all participants included in the study.