1. Immunoallergology Department, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte (CHLN), Lisbon, Portugal
2. Immunoallergology Department, Hospital Professor Doutor Fernando Fonseca, Amadora, Portugal
3. Immunoallergology Department, Centro Hospitalar de Tras-os-Montes e Alto Douro, Vila Real, Portugal
4. Allergy Unit, Pedro Hispano Hospital, Matosinhos, Portugal
5. Basic and Clinical Immunology Laboratory, Medical School, Porto University, Portugal