scientific article published on 20 August 2009
author: Nino Künzli, Alessandro Marcon, Bénédicte Leynaert, Cecilie Svanes, Joachim Heinrich, Thorarinn Gislason, Christer Janson, Debbie Jarvis, Jordi Sunyer, Simone Accordini, Matthias Wjst, Peter McBurney
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