* Corresponding authors

^a DICOMOSA Group, Department of Psychology, Area of Psychobiology, Universidade da Coruña, Research Services Building, Campus Elviña s/n, 15071-A Coruña, Spain
E-mail: blaffon@udc.es
Fax: +34 981167172
Tel: +34 981167000

^b Department of Cell and Molecular Biology, University of A Coruña, Faculty of Sciences, Campus A Zapateira s/n, 15071-A Coruña, Spain

^c Department of Environmental Health, Portuguese National Institute of Health, Rua Alexandre Herculano 321, Porto 4000-055, Portugal

^d EPIUnit - Institute of Public Health, University of Porto, Rua das Taipas no. 135, Porto 4050-600, Portugal