Zhu, Lingling
Xie, Limei http://orcid.org/0000-0002-5308-1786
Article History
Received: 19 March 2019
Accepted: 1 July 2019
First Online: 7 August 2019
Ethical approval
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.
: Lingling Zhu and Limei Xie declare that they have no conflicts of interest.
: Informed consent was obtained from all patients for being included in the study.