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Article History

Received: 17 April 2018

Accepted: 9 January 2019

First Online: 28 January 2019

Ethics approval and consent to participate

: This study was approved by the Research Ethics Committee of the Shandong Institute of Medicine and Health Information (IMHI-EC-16-001). The survey data were collected voluntarily and anonymously, without sensitive information about the participants. Prior to the questionnaire, all participants were given informed consent and detailed information explaining the purpose of the study.

: As a part of the consent process, all participants have agreed that collected information can be used for research and publication.

: The authors declare that they have no competing interests.

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