Funding for this research was provided by:
Japan Academy of Diabetes Education and Nursing Research Grant (2014)
Text and Data Mining valid from 2020-03-12
Received: 22 March 2019
Accepted: 28 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: Approval for this study was obtained from the ethics committee of the authors’ institution.A written explanation of the study and an informed consent form were delivered to participants by postal mail, and explanations were provided over the telephone. Additionally, all participants gave written informed consent to participate in this study. The study was performed in accordance with the Declaration of Helsinki and the Ethical Guidelines on Clinical Studies of the Ministry of Health, Labor and Welfare of Japan. This study is registered under the following ID: UMIN000026568.
: Not applicable.
: The authors declare that they have no competing interests.