den Boer, Joost C. L. http://orcid.org/0000-0002-6330-4445
Zijderveld, Steven A.
Bruers, Josef J. M.
Article History
Received: 30 November 2017
Accepted: 2 May 2018
First Online: 30 May 2018
Ethics approval and consent to participate
: The study protocol was approved by an independent review board of KNMT. In all editions, oral and maxillofacial surgeons eligible for participation received a letter in which the survey was announced and its background explained. By completion and returning questionnaire (by freepost or e-mail), oral and maxillofacial surgeons consented participation. Data were anonymized before analyses. Information that could be traced back to the oral and maxillofacial surgeon who answered the questions was only used for the analyses of the representativeness and for the inclusion or exclusion in later editions.
: The authors declare that they have no competing interests.
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