ACKNOWLEDGEMENTS
The authors thank to all surgeons, physician assistants and registrars for registration of data in the DUCA database, as well as the DUCA scientific committee for the approval and scientific input on this study.S.R.M. and M.R.V. are to be credited as joint first authors.The authors report no conflicts of interest.Supplemental Digital Content is available for this article. Direct URL citations are provided in the HTML and PDF versions of this article on the journal’s website, 