Chihara, Izumi
Ae, Ryusuke
Kudo, Yuka
Uehara, Ritei
Makino, Nobuko
Matsubara, Yuri
Sasahara, Teppei
Aoyama, Yasuko
Kotani, Kazuhiko
Nakamura, Yosikazu
Funding for this research was provided by:
Tochigi Prefectural Local Government
Article History
Received: 29 July 2017
Accepted: 16 April 2018
First Online: 25 April 2018
Ethics approval and consent to participate
: This study was approved by the Ethical Committee on Epidemiologic Research at Jichi Medical University (July 21, 2009, Eki09–09). The database information is originally anonymized. Instruction of this study documented that collaborators from all secondary and tertiary EDs are considered to have agreed to participate in the study by filling out and returning the questionnaires.
: The authors declare that they have no competing interests.
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