Received: 26 June 2018
Accepted: 10 September 2018
First Online: 5 October 2018
: Munhum Park and Armin G. Kolhrausch were affiliated with Philips Research during the study design and data acquisition.
: The need for formal ethical approval was waived by the regional medical ethics committee (registration number MJ504, Medisch-Ethische Toetsing Onderzoek Patienten en Proefpersonen (METOPP), Tilburg, The Netherlands).
: Not applicable.
: The authors declare that they have no competing interests related to this study.
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