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Vareille, Marjolaine; Alves, Marco P; Kopf, Brigitte S; Möller, Alexander; Geiser, Thomas; Johnston, Sebastian L; Edwards, Michael R; Regamey, Nicolas (2013). Retraction. Thorax, 68(9), p. 886. London: BMJ Publishing Group 10.1136/thoraxjnl-2011-200405ret