1. Bayer Vital GmbH, Leverkusen, Germany
2. Kurt-Blaum Platz 8, Hanau, Germany
3. Department of Medical Microbiology, Royal Free Hospital, London, UK
4. Bayer AG, Wuppertal, Germany
5. University Clinics Carl Gustav Carus, Medical Department-Pulmonology, Technical University Dresden, Dresden, Germany