1. Respiratory Medicine, GIGA I3, CHU Sart-Tilman, Liege, Belgium
2. Organic and Biological Analytical Chemistry Group and
3. Medical Genomics-BIO3, GIGA-R, University of Liege, Sart-Tilman, Liege, Belgium
4. Department of Pharmacology and Toxicology, School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, the Netherlands; and
5. Department of Respiratory Medicine, Maastricht University Medical Center, Maastricht, the Netherlands