Article History
Received: 17 April 2018
Accepted: 19 June 2018
First Online: 23 June 2018
Compliance with ethical standards
:
: This study was supported by collaborative research expenses from Seiko Epson Corporation.
: This study was conducted in accordance with International Conference on Harmonization-Good Clinical Practice and the Declaration of Helsinki (2008), and was approved by the Institutional Research Ethics Committee of Shinshu University School of Medicine (no. 2321, no. 2755) and the Human Ethics Committee of Seiko Epson Corporation (no. AHR-2013-005, no. AHR-2014-006).
: All subjects were given an adequate explanation of the study and each provided written informed consent.