Received: 22 February 2019
Accepted: 17 July 2019
First Online: 27 August 2019
Ethics approval and consent to participate
: Ethical approval was obtained from the institutional review committee. Written informed consent was obtained before a respondent completed the questionnaire. The questionnaire and surveys did not contain the name of the participants; thus, the confidentiality of the participants was maintained.
: Not applicable
: The authors declare that they have no competing interests.