Article History
Received: 14 February 2018
Accepted: 19 April 2018
First Online: 8 May 2018
Compliance with ethical standards
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: Dr. Ryo Okazaki received grants from Asahi-Kasei Pharma, Astellas Pharma, Chugai Pharmaceutical, Daiichi-Sankyo, EA Pharma, Eisai, Eli Lilly Japan, Ono Pharmaceutical, Taisho-Toyama Pharmaceutical, Takeda Pharmaceutical, and Teijin Pharma, outside of the submitted work. Mr. Ryoichi Muraoka and Mr. Masayuki Maehara received personal fees from EA Pharma Co. Ltd., during the course of the study. Dr. Daisuke Inoue received personal fees from EA Pharma, grants from Asahi-Kasei Pharma, Astellas Pharma, Chugai Pharmaceutical, Daiichi-Sankyo, Eisai, Eli Lilly Japan, Pfizer, Ono Pharmaceutical, Taisho-Toyama Pharmaceutical, Takeda Pharmaceutical, and Teijin Pharma, outside the submitted work.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.