Article History
Received: 5 March 2020
Accepted: 7 May 2020
First Online: 29 May 2020
Compliance with ethical standards
:
: The authors have no conflict of interests to declare.
: All patients involved consented to participate under the Clinical Patient ethical statement. The study was approved by the Institutional Ethical Board of The First-Affiliated Hospital of Hunan Normal University.
: Informed consent was obtained from all individual participants included in the study.