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Article History

Received: 7 June 2018

Accepted: 13 July 2018

First Online: 27 July 2018

Ethics approval and consent to participate

: The Medical Ethics Committee of the Urals State Medical University approved this study. All respondents were informed of the purpose of the survey. Written informed consent was obtained from all participants.

: N/A

: The authors declare that they have no competing interest.

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