Funding for this research was provided by:
Text and Data Mining valid from 2018-07-31
Received: 25 March 2018
Accepted: 11 July 2018
First Online: 31 July 2018
Ethics approval and consent to participate
: Ethical board approval was obtained from the local Institutional Review Boards. Centre 1: Medical Ethics Committee Maastricht, the Netherlands; METC 04-112. Centre 2: Medical Ethics Committee of Vejle and Funen, Odense, Denmark; S-VF-20040133. Informed consent was obtained from each patient prior to surgery.
: Not applicable
: The authors declare that they have no competing interests.
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