1 Department of Intensive Care Medicine, Multidisciplinary Intensive Care Research Organization (MICRO), St. James's Hospital, St. James Street, Dublin 8, Dublin, Ireland. drmartinloeches@gmail.com.
2 Hospital Clinic, IDIBAPS, Universidad de Barcelona, Ciberes, Barcelona, Spain. drmartinloeches@gmail.com.
3 Polyvalent Intensive Care Unit, São Francisco Xavier Hospital, Centro Hospitalar de Lisboa Ocidental, Lisbon, Portugal.
4 NOVA Medical School, CHRC, New University of Lisbon, Lisbon, Portugal.
5 Center for Clinical Epidemiology and Research Unit of Clinical Epidemiology, OUH Odense University Hospital, Odense, Denmark.
6 3rd Department of Internal Medicine, Sotiria General Hospital, Medical School, National and Kapodistrian University of Athens, 152 Mesogion St., 115 27, Athens, Greece.