1. Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón
2. Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
3. Department of Medicine, Division of Infectious Diseases, Escola Paulista de Medicina, Universidade Federal de São Paulo, Brazil
4. Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CB06/06/0058), Spain
5. Department of Medicine, School of Medicine, Universidad Complutense de Madrid, Spain