Text and Data Mining valid from 2018-03-27
Received: 1 December 2017
Accepted: 8 March 2018
First Online: 27 March 2018
: Animals used in this study were maintained in accordance with the guidelines of the Animal Resources Center of the Sapporo Medical University School of Medicine and the Japan SLC Laboratory Animal Care and Use Committee (D55–0215).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.