Funding for this research was provided by:
YASKAWA Electric Co., Ltd. Fukuoka, Japan
Text and Data Mining valid from 2020-05-06
Received: 27 November 2019
Accepted: 25 April 2020
First Online: 6 May 2020
Ethics approval and consent to participate
: The procedures used in this study complied with the Declaration of Helsinki 1975, as revised in 2013. After the study protocol was explained to prospective participants, written informed consent was obtained according to the ethical guidelines of the hospital. The study was carried out with the approval of the ethics committee of Kagoshima University (26-209) and was registered with UMIN-CTR (UMIN000018132).
: Not applicable.
: This work was supported in part by Yaskawa Electric Co., Ltd. Fukuoka, Japan. Dr. Shimodozono has received lecture fees and consulting fees from Yaskawa Electric Co. The other authors report no conflicts.