Article History
Received: 10 July 2020
Accepted: 5 November 2020
First Online: 9 November 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: 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 1975, as revised in 2008 (5). This research study was conducted retrospectively from data obtained for clinical purposes. We consulted extensively with the IRB of University of South China who determined that our study did not need ethical approval. An IRB official waiver of ethical approval was granted from the IRB of University of South China.
: Informed consent was obtained from all patients for being included in the study.
: Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.
: Not applicable for this paper.