Human immunodeficiency virus in injecting drug users in Europe following a reported increase of cases in Greece and Romania, 2011 Pharris, A and Wiessing, L and Sfetcu, O and Hedrich, D and Botescu, A and Fotiou, A and Nikolopoulos, G K and Malliori, M and Salminen, M and Suk, J E and Griffiths, P and van de Laar , M J, Eurosurveillance, 16, 20032 (2011), https://doi.org/10.2807/ese.16.48.20032-en