Analysis of volatile organic compounds in the breath of patients with stable or acute exacerbation of chronic obstructive pulmonary disease

Alex Pizzini, Wojciech Filipiak, Johannes Wille, Clemens Ager, Helmut Wiesenhofer, Róbert Kubinec, Jaroslav Blaško, Christoph Tschurtschenthaler, Chris A. Mayhew, Günter Weiss and Rosa Bellmann-Weiler