1. Département de Médecine, Centre Hospitalier de l’Université de Montréal, Montréal, Quebec, Canada
2. Department of Medicine, University of Calgary, Calgary, Alberta, Canada
3. Department of Pathology and
4. Department of Medicine, University of California, San Francisco, San Francisco, California; and
5. Department of Radiology, King’s College, Hospital National Health Service Foundation Trust, London, United Kingdom