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Article History

Accepted: 5 November 2020

First Online: 28 November 2020

Declarations

:

: The views expressed in this article are those of the authors and do not necessarily reflect the official views of the PMDA.

: Ryosuke Kuribayashi, Toru Yamaguchi, and Kazunori Takagi declare they have no conflicts of interest that might be relevant to the contents of this article.

: No external funding was used in the preparation of this manuscript.

: RK was the main writer of this article. RK, TY, and KT contributed to the fact finding and editing of this article.