1. Department of Nursing/Critical Care, Evanston Hospital, NorthShore University HealthSystem, Evanston, IL, USA
2. Department of Anesthesia/Critical Care, Evanston Hospital, NorthShore University HealthSystem, Chicago, IL, USA
3. Division of Vascular Surgery, Evanston Hospital, NorthShore University HealthSystem, Chicago, IL, USA
4. Department of Anesthesiology, Yale-New Haven Hospital, New Haven, CT, USA
5. Department of Internal Medicine, Fundació Privada Hospital de Mollet, Barcelona, Spain
6. Department of Cardiology, Ospedale Pauls Stradins Clinical University Hospital, Riga, Latvia
7. Department of Internal Medicine, Hospital General Universitario de Alicante, Alicante, Spain
8. Department of Internal Medicine, Hospital Universitario Joan XXIII de Tarragona, Tarragona, Spain
9. Department of Emergency Internal Medicine, Ospedale St John, Rome, Italy
10. Department of Pneumonology, Hospital General Universitario de Alicante, Alicante, Spain
11. Department of Internal Medicine, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain