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Article History

First Online: 9 March 2018

Compliance with Ethical Standards

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: All authors and physician collaborators declare that they have no competing interests to report.

: All procedures involving human subjects were in accordance with the standards and approval of the institutional ethics committees of all the participating hospitals. All patients were provided with a detailed explanation of the study protocol.

: All patients recruited at the hospitals signed an informed consent form approved by the ethics committees. Patients completing the questionnaires via internet were deemed to have consented to participate in the study, did not supply identifying details, and were not obligated to sign a consent form. Data were treated anonymously. The privacy rights of all participants were observed.