1. Kiwa Water Research, Chemical Water Quality and Health, PO Box 1072, 3430 BB Nieuwegein, The Netherlands
2. Suez Environment-CIRSEE, Health & Environment Department-Analysis & Health Division, 38 rue du Pdt Wilson, 78230 Le Pecq, France
3. DVGW-Technologiezentrum Wasser (TZW), Karlsruher Strasse 84, 76139 Karlsruhe, Germany