Received: 18 September 2017
Accepted: 11 December 2018
First Online: 15 February 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee in the Chaim Sheba Medical Center in Tel-Ha’Shomer in November 2013, number SMC-13-0589. Further approval was not required by the other participating establishments. As participation required voluntarily filling and actively returning anonymous forms, this was considered equivalent to consent, and our study was exempt from any further procedures on this matter. No additional procedure was demanded locally by any of the other 7 institutions.
: Not applicable.
: The authors declare that they have no competing interests.
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