Velonakis, Emanouil Karanika, Maria Mouchtouri, Varavara and Thanasias, Efthimios Katsiaflaka, Anna Vatopoulos, Alkis and Hadjichristodoulou, Christos, Decreasing trend of Legionella isolation in a long-term microbial monitoring program in Greek hospitals, International Journal of Environmental Health Research, (22), 197-209, 2012, TAYLOR & FRANCIS LTD LONDON, 0960-3123, 1369-1619