Article History
Received: 19 March 2019
Accepted: 13 November 2019
First Online: 28 January 2020
Compliance with Ethical Standards
: The study and the questionnaire was approved by Helsinki committee 5018–18-SMC and was conducted in accordance with the provisions of the Declaration of Helsinki and GCP and adhered to ICMJE guidelines with regard to study registration.
: The authors declare that they have no conflicts of interest.