[1] Univ Surrey, Environm Psychol Res Grp, Guildford, England
[2] Univ Surrey, Dept Psychol Sci, Guildford, England
[3] Univ Milano Bicocca, Dept Psychol, Pzza Ateneo Nuovo 1, I-20126 Milan, MI, Italy
[4] Univ Basque Country UPV EHU, Dept Clin & Hlth Psychol & Res Methods, Ave Tolosa 70, San Sebastian 20018, Spain
[5] Bradford Royal Infirm, Bradford Inst Hlth Res, Temple Bank House,Duckworth Lane, Bradford BC 6RJ, England
[6] Inst Salud Carlos III, Spanish Consortium Res Epidemiol & Publ Hlth CIBER, C Monforte Lemos 3-5, Madrid 280, Spain
[7] Biogipuzkoa Hlth Res Inst, Grp Environm Epidemiol & Child Dev, Paseo Doctor Begiristain S-N, San Sebastian 20014, Spain
[8] Univ West England, Ctr Transport & Soc, Bristol, England