[1] Hospital Universitario de Getafe,Servicio de Cuidados Intensivos
[2] University of Texas Health Science Center,Mount Sinai Hospital and University Health Network
[3] Department of Medicine of Vanderbilt University and the Tennessee Valley Veteran’s Affairs Geriatric Research Education and Clinical Center,undefined
[4] Hôpital Henri Mondor,undefined
[5] University of Toronto,undefined
[6] Hospital Profesor Posadas,undefined
[7] Loyola University of Chicago and Hines Veterans Affairs Hospital,undefined
[8] South Manchester University Hospital,undefined
[9] Papageorgiou Hospital,undefined
[10] Hospital da Universidade,undefined
[11] Centre Hospitalo-Universitaire Fattouma Burghuiba,undefined