1. Center for Research in Environmental Epidemiology (CREAL); Barcelona Catalonia Spain
2. Hospital del Mar Research Institute (IMIM); Barcelona Spain
3. CIBER Epidemiología y Salud Pública; Barcelona Catalonia Spain
4. Arizona Respiratory Center; Tucson AZ USA
5. Department of Nutrition and Food Science; Faculty of Pharmacy; University of Barcelona; Barcelona Catalonia Spain
6. Department of Experimental and Health Sciences; Pompeu Fabra University; Barcelona Catalonia Spain