1. Department of Intensive Care Medicine, Radboud University Medical Center Radboud Institute for Health Sciences Nijmegen The Netherlands
2. Department of Anesthesiology and Intensive Care, Faculty of Medicine and Health, School of Medical Sciences Örebro University Örebro Sweden
3. Department of Human Physiology, College of Medicine and Public Health Flinders University Adelaide South Australia Australia
4. Department for Health Evidence, Section Biostatistics Radboud University Medical Center Nijmegen The Netherlands