1. Department of Pediatrics; Centro Hospitalar de S. João; Porto Portugal
2. CINTESIS; Center for Health Technologies and Information Systems Research; Faculty of Medicine; University of Porto; Porto Portugal
3. Department of Pediatrics; Faculty of Medicine; University of Porto; Porto Portugal
4. MEDCIDS; Department of Community Medicine; Health Information and Decision; Faculty of Medicine; University of Porto; Porto Portugal
5. Allergy Unit; CUF Institute & Hospital; Porto Portugal