Article History
Received: 14 November 2017
Accepted: 11 April 2018
First Online: 24 April 2018
Compliance with ethical standards
:
: Eriko Kobayashi has no conflict of interest. Chiemi Abe has no conflict of interest. Nobunori Satoh has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: Patients’ consent to participate was indicated by returning the completed questionnaire.