1 LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
2 Departamento de Pediatria (UAG-MC), Hospital de São João, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal.
3 LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal. Electronic address: sofia.sousa@fe.up.pt.