1 Serviço de Imunoalergologia, Centro Hospitalar São João, EPE, Porto, Portugal; Laboratory of Immunology, Basic and Clinical Immunology Unit, Faculty of Medicine, University of Porto, Porto, Portugal.
2 Allergology, CUF Porto Hospital and Instituto, Porto, Portugal; CINTESIS - Center for Research in Health Technologies and Information Systems, Faculty of Medicine, University of Porto, Porto, Portugal.