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Article History

Received: 20 September 2018

Accepted: 8 April 2019

First Online: 8 May 2019

Ethics approval and consent to participate

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee at which the studies were conducted (IRB approval number 14-J010) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. We provided all individual patients with the option to opt out of participation.

: Not applicable.

: Honoraria: YK received lecture fees from Chugai Pharmaceutical Co., Ltd. Other authors have declared that no competing interest exists.

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