Received: 3 February 2019
Accepted: 6 May 2019
First Online: 23 May 2019
Ethics approval and consent to participate
: Data from the electronic patient files were used strictly anonymously, and patients were not submitted to any specific action related to the study, and therefore according to Dutch Law on Medical Ethics [CitationRef removed], no specific informed consent or a review of a Medical Ethics Committee was required.
: Not applicable.
: The authors declare that they have no competing interests.
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