1. Institute of Medical Microbiology & Hygiene, Saarland University, Homburg/Saar, Germany
2. Swiss Tropical & Public Health Institute, Allschwil, Switzerland
3. University of Basel, Basel, Switzerland
4. Helmholtz Institute for Pharmaceutical Research Saarland, Saarbrücken, Germany
5. Institute of Pneumology at the University of Cologne, Bethanien Hospital, Clinic for Pneumology & Allergology, Centre of Sleep Medicine & Respiratory Care, Solingen, Germany