1. Primary Care Health Centre Raval Nord, Institut Català de la Salut, Barcelona, Spain
2. Infectious Diseases Department, STI Unit Vall d’Hebron Drassanes, Hospital Vall d'Hebron, Barcelona, Spain
3. Gastroenterology, Consorci Parc de Salut MAR de Barcelona, Barcelona, Spain
4. Pathology, Consorci Parc de Salut MAR de Barcelona, Barcelona, Spain
5. STI/HIV Area, Institut Català de la Salut, Barcelona, Spain
6. Medicine Department, Universitat Autonoma de Barcelona, Barcelona, Spain