HIV/STI co-infection among men who have sex with men in Spain Diaz, A and Junquera, M L and Esteban, V and Martínez, B and Pueyo, I and Suárez, J and Ureña, J M and Varela, J A and Vall, M and del Romero, J and Sanz, I and Belda, J and Boronat, J and Gómez, P and Gual, F and Colomo, C and López de Munain, J and Balaguer, J and Landa, M C and Lezaun, M E and Cámara, M C and Fernández, E and Bru, F J and Alastrue, I and Ordoñana, J R and de Armas, C and Azpiri, M A and Gomez, L and Trullén, J and Diez, M and on behalf of STI Study Group and EPI-VIH Group, Eurosurveillance, 14, 19426 (2009), https://doi.org/10.2807/ese.14.48.19426-en