sentences:  A Ministry of Health report in 2004 found increased levels of dioxin in the blood of long-term residents of the area, but with no clear indication that this had increased rates of disease.A larger study in 2008 of former workers in the Dow factory showed low levels of dioxin in their blood and no link between dioxin and health issues.The 4 April 2005 issue of "Investigate" contains an interview with then Labour MP John Tamihere.