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Article History

Received: 10 January 2018

Accepted: 25 May 2018

First Online: 19 June 2018

Ethics approval and consent to participate

: The study proposal was approved by the Regional Biomedical Research Ethics Committee in Vilnius, Lithuania; Number 158200–15–795-313. The Regional Biomedical Research Ethics Committee freed investigators from the informed consent form (this is written on permission to conduct biomedical research), because in this study an anonymous survey was used and no patient personal data was requested. After first reading the questionnaire’s information page, patients who agreed to participate simply filled out the questionnaire, and patients who didn’t agree did not fill it out.

: The authors declare that they have no competing interests.

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