Funding for this research was provided by:
Heilongjiang Provincial Postdoctoral Science Foundation (LBH-Q16125)
Natural Science Foundation of Heilongjiang Province (QC2017075)
National Nature Science Foundation of China (61275117)
University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province (No.UNPYSCT-2017095)
Article History
Received: 15 August 2019
Accepted: 9 December 2019
First Online: 13 December 2019