Secondhand smoke exposure assessment in outdoor hospitality venues across 11 European countries. - Henderson, Elisabet; Continente, Xavier; Fernández, Esteve; Tigova, Olena; Cortés-Francisco, Nuria; Gallus, Silvano; Lugo, Alessandra; Semple, Sean; Dobson, Ruaraidh; Clancy, Luke; Keogan, Sheila; Ruprecht, Ario; et al. (Environmental Research, 2021)