Wu, Keyan
Feng, Yun
Li, Yusheng
Li, Li
Liu, Rui
Zhu, Liande
Article History
Received: 6 April 2020
Revised: 25 May 2020
Accepted: 11 June 2020
First Online: 25 June 2020
Compliance with ethical standards
: This study was approved by the Ethics Committee of Northeast Normal University and implemented according to their ethical standards. The informed consent of all donors was obtained before testing the serum samples acquired from a local hospital (The Hospital Affiliated to Northeast Normal University).
: The authors declare that they have no conflict of interest.