Kiuchi, Tai
Higuchi, Makio
Takamura, Akihiro
Maruoka, Masahiro
Watanabe, Naoki
Article History
Received: 2 February 2015
Accepted: 8 June 2015
First Online: 6 July 2015
Change Date: 3 August 2015
Change Type: Erratum
Change Details: In the PDF version of this article initially published, the Acknowledgments section erroneously listed the Uehara Memorial Foundation as a funder twice. The error has been corrected in the PDF version of this article.
Competing interests
: The authors declare no competing financial interests.