1. Virology and Pathogenesis Group, Galicia Sur Health Research Institute (IIS Galicia Sur), Vigo, Spain.
2. Infectious Diseases Unit, Department of Internal Medicine, Álvaro Cunqueiro Hospital, Vigo, Spain.
3. Anal Dysplasia Unit, General Surgery Department, Álvaro Cunqueiro Hospital, Vigo, Spain.
4. Department of Pathology, Álvaro Cunqueiro Hospital, Vigo, Spain.
5. Microbiology and Infectology Research Group, Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain.
6. Microbiology Department, Complexo Hospitalario Universitario de Vigo (CHUVI), Sergas, Vigo, Spain.