1. Department of Medicine and Laboratory, Gambo Rural General Hospital, Kore, West-Arsi, Gambo, Ethiopia.
2. Department of Medicine, Universidad Autónoma de Madrid, Madrid, Spain.
3. Department of Otorhinolaryngology-Head and Neck Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
4. Division of Infectious Diseases, IIS-Fundación Jiménez Díaz, Madrid, Spain.
5. Department of Microbiology, University Hospital Príncipe de Asturias, Madrid, Spain.