Funding for this research was provided by:
JSPS KAKENHI (JP18K09030)
Received: 30 July 2020
Accepted: 24 January 2021
First Online: 4 February 2021
Ethics approval and consent to participate
: This study was approved by the ethical committee of the Kobe University. All cells donors signed informed consent documents. The authors declare that they have no conflict of interest.
: Not applicable.
: The authors have no competing interests to declare.