Ji, Xianglu
Kamara, Allieu
Wang, Enbo http://orcid.org/0000-0003-3394-2670
Liu, Tianjing
Shi, Liwei
Li, Lianyong
Article History
Received: 14 May 2019
Accepted: 4 October 2019
First Online: 9 November 2019
Ethics approval and consent to participate
: The Medical Ethics Committee of Shengjing Hospital of China Medical University approved this study (reference number 2018PS361K). All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional review board and ethics committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable. For this type of study, formal consent is not required.
: The authors declare that they have no competing interests.