1 Departments of Anesthesiology and Critical Care Medicine and Oncology and Palliative Care Program, The Johns Hopkins School of Medicine, Baltimore, MD, USA. raslaks1@jhmi.edu.
2 Department of Health, Behavior and Society, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. raslaks1@jhmi.edu.
3 Department of Intensive Care Medicine, Gelre Hospitals, Apeldoorn, The Netherlands. p.spronk@gelre.nl.