Timothy Langford Christophe G. Giraud-Carrier John Magee Detection of Infectious Outbreaks in Hospitals through Incremental Clustering. 30-39 2001 conf/aime/2001 AIME http://link.springer.de/link/service/series/0558/bibs/2101/21010030.htm db/conf/aime/aime2001.html#LangfordGM01