Received: 6 October 2017
Accepted: 2 May 2019
First Online: 11 May 2019
Ethics approval and consent to participate
: This retrospective cross-sectional observational study was approved by the Medical Ethical Committee of the St. Antonius Hospital, Nieuwegein/Utrecht, the Netherlands (W17.013), and performed in accordance with the Helsinki Declaration of 1975, as revised in 2008. Need for written informed consent was formally waived by the ethics committee as only data obtained from routine clinical care were used and analyzed anonymously (W17.013).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.