Following the Mixtures of Organic Micropollutants with In Vitro Bioassays in a Large Lowland River from Source to Sea - Elena Hommel; Maria König; Georg Braun; Martin Krauss; Norbert Kamjunke; Werner Brack; Anna Matousu; Tina Sanders; Ingeborg Bussmann; Eric P. Achterberg; Björn Raupers; Beate I. Escher (ACS Environmental Au)