Yang, Xiang
Liu, Jiagang
Zhang, Yuekang
Richard, Seidu A.
Article History
Received: 14 April 2018
Accepted: 7 June 2018
First Online: 18 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the West China Hospital of Sichuan University and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.
: Informed consent was obtained from all individual participants included in the study. Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.