Secondhand smoke exposure assessment in outdoor hospitality venues across 11 European countries - Henderson, Elisabet (Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública) ; Continente, Xavier (Institut d'Investigació Biomèdica Sant Pau) ; Fernández, Esteve (Consortium for Biomedical Research in Respiratory Diseases (CIBERES)) ; Tigova, Olena (Consortium for Biomedical Research in Respiratory Diseases (CIBERES)) ; Cortés-Francisco, Nuria (Institut d'Investigació Biomèdica Sant Pau) ; Gallus, Silvano (Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Environmental Health Sciences) ; Lugo, Alessandra (Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Department of Environmental Health Sciences) ; Semple, Sean (Institute for Social Marketing and Health, University of Stirling) ; Dobson, Ruaraidh (Institute for Social Marketing and Health, University of Stirling) ; Clancy, Luke (TobaccoFree Research Institute Ireland) ; Keogan, Sheila (TobaccoFree Research Institute Ireland) ; Ruprecht, Ario (Fondazione IRCCS Istituto Nazionale Dei Tumori) ; Borgini, Alessandro (Fondazione IRCCS Istituto Nazionale Dei Tumori) ; Tzortzi, Anna (George D. Behrakis Research Lab, Hellenic Cancer Society) ; Vyzikidou, Vergina K. (George D. Behrakis Research Lab, Hellenic Cancer Society) ; Gorini, Giuseppe (Istituto per lo Studio, la Prevenzione e la Rete Oncologica (ISPRO)) ; López-Nicolás, Angel (Universidad Politécnica de Cartagena) ; Soriano, Joan B.. (Hospital Universitario de la Princesa (Madrid)) ; Geshanova, Gergana (Smoke-free Life Coalition) ; Osman, Joseph (OFT Conseil, Office Français de Santé et Bien-être Au Travail) ; Mons, Ute (University Hospital Cologne) ; Przewozniak, Krzysztof (Collegium Civitas) ; Precioso, José (Instituto de Educação, Universidade do Minho) ; Brad, Ramona (Healthy Romania Generation 2035 Association) ; López, Maria J. (Institut d'Investigació Biomèdica Sant Pau) ; Universitat Autònoma de Barcelona