RT Journal Article SR Electronic T1 Second-hand smoke exposure in a sample of European hospitals (2007) JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00180708 A1 E. Fernández A1 C. Martínez A1 M. Fu A1 J.M. Martínez-Sánchez A1 M.J. López A1 G. Invernizzi A1 A. Ouranou A1 B. Dautzenberg A1 M. Nebot YR 2009 UL http://erj.ersjournals.com/content/early/2009/02/27/09031936.00180708.abstract AB