<p><b>Copyright information:</b></p><p>Taken from "Hygienic safety of reusable tap water filters (Germlyser) with an operating time of 4 or 8 weeks in a haematological oncology transplantation unit"</p><p>http://www.biomedcentral.com/1471-2334/7/45</p><p>BMC Infectious Diseases 2007;7():45-45.</p><p>Published online 23 May 2007</p><p>PMCID:PMC1892024.</p><p></p