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Article History

Received: 5 May 2018

Accepted: 3 September 2018

First Online: 10 September 2018

Ethics approval and consent to participate

: The handling of human tissue was approved by the Ethics Committee of Osaka University Graduate School of Medicine, Japan (reference no. 13402), and informed, written consent was obtained from all donors.All animal experiments were conducted according to the Guide for the Care and Use of Laboratory Animals published by the National Institutes of Health (Bethesda, MD, USA). Experimental protocols were approved by the Institutional Ethics Review Committee for Animal Experimentation of Osaka University Graduate School of Medicine (reference no. 25–100-002).

: Not applicable.

: The authors declare that they have no competing interests.

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