Text and Data Mining valid from 2018-11-24
Received: 12 August 2018
Revised: 21 October 2018
Accepted: 15 November 2018
First Online: 24 November 2018
Compliance with ethical standards
: Kazuhisa Sugiyama has the position on advisory board of Kowa Company and has received a speaker honorarium. The other authors declare that they have no competing interests.
: Ethical approval: all applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of Kanazawa University (Ishikawa, no. 132712).