1. Liver Transplantation Centre, Hospital Curry Cabral, 1069-166 Lisbon, Portugal
2. Critical Care and Emergency CGU, Puerto Real University Hospital, 11510 Cadiz, Spain
3. CEDOC, Faculdade de Ciências Médicas, 1169-056 Lisbon, Portugal
4. Intensive Care Unit, Hospital Curry Cabral, 1069-166 Lisbon, Portugal