1. Ariadne Labs at Brigham and Women's Hospital and the Harvard T. H. Chan School of Public Health, Boston, Massachusetts, USA.
2. Department of Pulmonary Diseases, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
3. Department of General Practice and Elderly Care Medicine, University Medical Center Groningen, Groningen, the Netherlands.
4. Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.
5. Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.
6. Division of Palliative Care, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.