1. Pediatric Unit, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37126 Verona, Italy
2. General Practitioner, 30100 Venezia, Italy
3. General Practitioner, 37100 Verona, Italy
4. Faculty of Nursing, University of Thessaly, 38221 Volos, Greece
5. School of Physical Education, Sport Science & Dietetics, University of Thessaly, 38221 Volos, Greece
6. Pediatric Cough and Asthma Center, Istituti Ospedalieri Bergamaschi, University and Research Hospitals, 24036 Bergamo, Italy