Prevalence of tobacco use, exposure to secondhand smoke and knowledge on smoking cessation among students of health professions in Central Greece: a cross-sectional study von Samara, Athina A, Rachiotis, George, Pettemeridou, Sofia, Papastamatiou, Konstantinos, Tourlakopoulos, Konstantinos, Chelioti, Eythimia, Katsioulis, Antonis, Hadjichristodoulou, Christos S

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