Received: 4 June 2019
Revised: 20 August 2019
Accepted: 27 August 2019
First Online: 27 September 2019
Compliance with ethical standards
: MK, TH, NN, NT, TN, AN, HM, AU, MK, JS, SK and AH received a grant from OMRON Healthcare Co., Ltd. KM and HK are employees of OMRON Healthcare Co., Ltd. Other authors declare that they no conflict of interest.