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3. M. Mellon, C. Benbrook, K. Lutz Benbrook, Union of Concerned Scientists, Cambridge, MA, USA, 2001.
4. R.J. Ash, J.L. Iverson, NGWA Fourth International Conference on Pharmaceuticals and Endocrine Disrupting Chemicals in Water, Minneapolis, USA, 2004.
5. Occurrence of drugs in German sewage treatment plants and rivers1Dedicated to Professor Dr. Klaus Haberer on the occasion of his 70th birthday.1