Yin, Min
Chen, Aiping
Zhao, Fei
Ji, Xuechao
Li, Chuan
Wang, Guangning
Funding for this research was provided by:
Qingdao University (2017M21)
Article History
Received: 29 January 2020
Accepted: 3 April 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The protocol for the research project was approved by the Medical Ethics Committee of our hospital. Since all specimens used were anonymous, the Medical Ethics Committee exempted patients from the need for informed consent.
: Not applicable.
: The authors declare that they have no competing interests.