Funding for this research was provided by:
Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan (C 16H04264, C 16k01570)
Text and Data Mining valid from 2018-06-15
Received: 8 March 2018
Accepted: 21 May 2018
First Online: 15 June 2018
Compliance with ethical standards
: All studies involved in this manuscript received approval from the Ethics Committee of Himeji Dokkyo University before study initiation. All subjects provided written informed consent prior to measurements.
: The authors declare that they have no conflicts of interest.