Received: 18 January 2016
Accepted: 14 March 2018
First Online: 20 March 2018
Ethics approval and consent to participate
: The study protocol was granted approval by the VU University Medical Center ethical review board in Amsterdam. The Ethics committee of VU University Medical Center, Amsterdam, approved the study and necessity for informed consent was waived. Information from the clinical records was anonymized and de-identified prior to analysis.
: Not applicable.
: The authors declare that they have no competing interests.
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