Bech, A. P.
Hoorn, E. J.
Zietse, R.
Wetzels, J. F. M.
Nijenhuis, T.
Article History
Received: 22 December 2017
Accepted: 27 August 2018
First Online: 4 September 2018
Ethics approval and consent to participate
: Given the retrospective character, no ethical approval was necessary. This is in accordance to our Dutch law on medical scientific research (WMO; Wet medisch-wetenschappelijk onderzoek) and local ethical policies. The law states that no ethical approval is necessary for retrospective research in which patients are not subjected to actions or codes of conduct which are imposed on them. Patients consented in use of their data.
: Not applicable.
: The results presented in this paper have not been published previously. None of the authors has a conflict of interest.
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