1. Allergy Unit Department of Clinical and Molecular Sciences Polytechnic University of Marche Ancona Italy
2. Department of Internal Medicine University Hospital Ospedali Riuniti di Ancona Ancona Italy
3. Postgraduate School of Allergy and Clinical Immunology Università Politecnica delle Marche Ancona Italy
4. Allergy Unit IRCCS Ospedale Policlinico San Martino Genova Italy
5. Integrated System for Health, Social Assistance and Welfare Istituto Nazionale di Statistica Rome Italy