Received: 17 April 2020
Accepted: 7 June 2020
First Online: 23 June 2020
Ethics approval and consent to participate
: The study using human blood was approved by the clinical research committee of Tokai University (19R067). Blood was collected from a healthy volunteer with written consent. All the experiments were carried out in accordance with the relevant guidelines and regulations.
: All authors read and approved the final manuscript.
: The authors declare no conflict of interest.