1. Infectious Disease Service, Intensive Care Unit; Nephrology Research and Development Unit (FCT-725) and Faculty of Medicine of University of Porto, São João Hospital Centre, Alameda Professor Hernâni Monteiro, Porto, Portugal
2. Agrarian Superior School, Polytechnic Institute of Viseu, Quinta da Alagoa-Estrada de Nelas, Ranhados, Viseu, Portugal
3. Laboratory of Microbiology, Department of Biological Sciences, Faculty of Pharmacy of University of Porto, Rua Jorge Viterbo Ferreira, Porto, Portugal
4. Neurology Service, University of Porto, São João Hospital Centre, Alameda Professor Hernâni Monteiro, Porto, Portugal
5. Clinical Pathology Service, São João Hospital Centre, Alameda Professor Hernâni Monteiro, Porto, Portugal