Correction: Comparison of Two Devices and Two Breathing Patterns for Exhaled Breath Condensate Sampling

• Eva-Maria Hüttmann,
• Timm Greulich,
• Janine Koepke,
• Christoph Nell,
• Akira Hattesohl,
• Severin Schmid,
• Sarah Noeske,
• Christian Herr,
• Gerrit John,
• Rudolf A. Jörres,
• Bernd Müller,
• Claus Vogelmeier,
• Andreas Rembert Koczulla