- Correspondence to Dr Esteve Fernández, Tobacco Control Unit, Institut Català d'Oncologia, Av. de la Granvia de l'Hospitalet, 199–203, L'Hospitalet de Llobregat, Barcelona 08908, Spain;
- Received February 5, 2014
- Accepted August 29, 2014
- First published September 19, 2014.
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