HIV-1 outbreak among injecting drug users in Greece, 2011: a preliminary report Paraskevis, D and Nikolopoulos, G and Tsiara, C and Paraskeva, D and Antoniadou, A and Lazanas, M and Gargalianos, P and Psychogiou, M and Malliori, M and Kremastinou, J and Hatzakis , A, Eurosurveillance, 16, 19962 (2011), https://doi.org/10.2807/ese.16.36.19962-en