School smoking policies and educational inequalities in smoking behaviour of adolescents aged 14–17 years in Europe
Mirte A G Kuipers, Rosaline de Korte, Victoria Eugenia Soto, Matthias Richter, Irene Moor, Arja H Rimpelä, Julian Perelman, Bruno Federico, Anton E Kunst, Vincent Lorant
J Epidemiol Community Health Feb 2016, 70 (2) 132-139; DOI: 10.1136/jech-2015-205831