An outbreak of legionnaires disease caused by long-distance spread from an industrial air scrubber in Sarpsborg, Norway

Karin Maria Nygård, Øyvind Werner-Johansen, Svein Rønsen, Dominique A Caugant, Øystein Simonsen, Anita Kanestrøm, Eirik Ask, Jetmund Ringstad, Rune Ødegard, Tore Jensen, Truls Krogh, Ernst Arne Høiby, Eivind Ragnhildstveit, Ingeborg Aase S. Aaberge, Preben Aavitsland