[1] Curry Cabral Hosp, Nova Med Sch, Transplant Unit, Lisbon, Portugal
[2] Northwestern Univ, Feinberg Sch Med, Dept Neurol, Div Neurocrit Care, Chicago, IL USA
[3] Curry Cabral Hosp, Nova Med Sch, Intens Care Unit, Lisbon, Portugal
[4] Curry Cabral Hosp, Transplant Unit, Lisbon, Portugal
[5] Curry Cabral Hosp, Intens Care Unit, Lisbon, Portugal
[6] Sao Francisco Xavier Hosp, Intens Care Unit, Lisbon, Portugal
[7] Northwestern Univ, Feinberg Sch Med, Dept Med, Chicago, IL USA
[8] Univ Alberta, Fac Med & Dent, Dept Crit Care Med, Alberta Hlth Serv, Edmonton, AB, Canada
[9] Univ Alberta, Fac Med & Dent, Liver Unit, Edmonton, AB, Canada
[10] Alberta Hlth Serv, Edmonton, AB, Canada
[11] Univ Alberta, Fac Med & Dent, Dept Crit Care Med, Liver Unit, Edmonton, AB, Canada
[12] Cent Lisbon Univ Hosp Ctr, Curry Cabral Hosp, R Beneficiencia N8, P-1050099 Lisbon, Portugal