- Correspondence to Dr Matthias Mottini, Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern 3010, Switzerland;
- Received 29 November 2016
- Revised 20 January 2017
- Accepted 4 April 2014
- Published in print 1 October 2017.
- Published online 26 September 2017.
- Published first 3 March 2017.
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