Nagamitsu, Shinichiro http://orcid.org/0000-0001-7156-6050
Mimaki, Masakazu
Koyanagi, Kenshi
Tokita, Natsuko
Kobayashi, Yoriko
Hattori, Ritsuko
Ishii, Ryuta
Matsuoka, Michiko
Yamashita, Yushiro
Yamagata, Zentaro
Igarashi, Takashi
Croarkin, Paul E.
Funding for this research was provided by:
Ministry of Education, Culture, Sports, Science and Technology (#19K0266119)
Ministry of Health, Labour and Welfare (H28Sukoyaka-001)
Ministry of Health, Labour and Welfare (H29Sukoyaka-005, H29Sukoyaka-005, H30ukoyaka-Ippan-004, H31Sukoyaka-19DA1003)
Japan Agency for Medical Research and Development (BIRTHDAY)
Article History
Received: 16 March 2020
Accepted: 28 September 2020
First Online: 6 October 2020
Ethics approval and consent to participate
: The design of this study and procedures for obtaining informed consent were approved by the Medical Ethics Committee of Kurume University School of Medicine (#16159). Participants’ parents were informed about this questionnaire survey by letter, and the participating schools obtained passive informed consent from participants. Verbal consent was obtained from the parents of participants under the age of 16. The verbal contents were also obtained from participants, that was approved by the ethics committee. There was an opt out method for parents or students that did not want to participate in the study.
: Not applicable.
: All authors declare that they have no conflicts of interest.