1. Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Universidad Complutense de Madrid, Madrid, Spain
2. Instituto de Investigación Sanitaria del Hospital Gregorio Marañón, Madrid, Spain
3. CIBER de Enfermedades Respiratorias (CIBERES CD06/06/0058), Palma de Mallorca, Spain
4. Department of Medicine, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain
5. Department of Medical Microbiology and Infectious Diseases, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands