1. Department of Cardiothoracic Surgery, Medisch Spectrum Twente, Enschede, the Netherlands
2. University of Professional Education Utrecht, Department of Healthcare, the Netherlands
3. University Medical Center Utrecht, Nursing Science, Utrecht, the Netherlands
4. Department of Epidemiology, Medisch Spectrum Twente, Enschede, the Netherlands
5. Department of Research Methodology, Measurement and Data Analysis, Faculty of Behavioral Sciences, University of Twente, Enschede, the Netherlands