Isomura, T
Suzuki, S
Origasa, H
Hosono, A
Suzuki, M
Sawada, T
Terao, S
Muto, Y
Koga, T
Article History
Received: 7 September 2015
Revised: 7 March 2016
Accepted: 11 March 2016
First Online: 18 May 2016
Change Date: 2 November 2016
Change Type: Correction
Change Details: This article has been corrected since Advance Online Publication and a corrigendum is also printed in this issue
Competing interests
: TI is a founder and the chief executive of Clinical Study Support Inc. TS and ST are current employees of Clinical Study Support Inc. MS and YM were previously employed by Clinical Study Support Inc. TK is a member of an advisory board of the company. The remaining authors declare no conflict of interest.