Spatial variation of PM elemental composition between and within 20 European study areas - Results of the ESCAPE project - Tsai,M-Y; Hoek,G; Eeftens,M; de,Hoogh K; Beelen,R; Beregszaszi,T; Cesaroni,G; Cirach,M; Cyrys,J; De,Nazelle A; de,Vocht F; Ducret-Stich,R; et al. (ENVIRONMENT INTERNATIONAL, 2015)