Funding for this research was provided by:
National research foundation of Korea (2019R1C1C1002170)
Received: 7 April 2021
Accepted: 8 June 2021
First Online: 28 June 2021
: The study was approved by the ethics committee of the Korea National Institute of Health and the Kyungpook National University. An approval form was used to obtain written, informed consent from each participant. Each participant also consented to provide 5 and 20-mL blood samples for immunoassays and lymphoblastic proliferation assays, respectively.
: Not applicable.
: The authors declare that they have no competing interests.