1. Infectious Diseases Unit, Hospital Central de Asturias, Oviedo University School of Medicine, Barcelona, Spain.
2. Department of Internal Medicine, Hospital Monte Naranco, Oviedo, Barcelona, Spain.
3. Infectious Diseases Unit, Hospital de Galdácano, Vizcaya, Barcelona, Spain.
4. Department of Radiology, Hospital Central de Asturias, Oviedo University School of Medicine, Barcelona, Spain.
5. Infectious Diseases Unit, Hospital Clinic Universitari, Barcelona, Spain.