Funding for this research was provided by:
Heilongjiang Provincial Science and Technology Department (YS17C22)
innovative scientific research project of Harbin medical university (201820)
Article History
Received: 31 January 2019
Accepted: 9 April 2019
First Online: 20 April 2019
Compliance with ethical standards
:
: The authors report no conflicts of interest related to this work.
: Ethical approval was provided by the Institutional Review Board of Harbin Medical University. Ethical approval was obtained from the Hospital Research Ethics Committee.
: Informed consent was obtained from all patients included in the study.
: A copy of the consent form can be requested at any stage.
: The data sets analyzed during the current study are available from the corresponding author on reasonable request.