1. Department of Pediatrics; Centro Hospitalar de S. João; Porto Portugal
2. CINTESIS - Center for Research in Health Technologies and Information Systems - Faculty of Medicine; University of Porto; Porto Portugal
3. Department of Pediatrics - Faculty of Medicine; University of Porto; Porto Portugal
4. Allergy Unit; CUF Institute & Hospital; Porto Portugal
5. Allergy and Clinical Immunology Division Unit; CUF Descobertas and CUF Infante Santo Hospital; Lisbon Portugal
6. Sociedade Portuguesa de Alergologia e Imunologia Clínica; Lisbon Portugal
7. Health Information and Decision Sciences Department - Faculty of Medicine; Porto University; Porto Portugal