1. Allergy Unit Hospital Universitario Río Hortega Valladolid Spain
2. Paediatric Service, Hospital Rio Carrión Palencia Spain
3. Molecular Biology Department Cellular Biology Área León University León Spain
4. Histology Department Valladolid University Valladolid Spain
5. Biodiversity and Environmental Management University of León León Spain
6. Institute of Atmospheric Sciences and Climate National Research Council Bologna Italy