Received: 27 May 2019
Accepted: 23 July 2019
First Online: 31 July 2019
Ethics approval and consent to participate
: All patients gave written informed consent for use of their anonymized data for scientific purposes. The study was approved by the institutional research department and performed in accordance with the Declaration of Helsinki. Approval of the local ethical committee for the present study was not necessary since the study does not fall within the scope of the Dutch Medical Research Involving Human Subjects Act (section 1.b WMO, 26th February 1998).
: Not applicable
: The authors declare that they have no competing interests.