Johnson, A C, Jürgens, M D, Williams, R J, Kümmerer, K, Kortenkamp, A & Sumpter, J P 2008, ' Do Cytotoxic Chemotherapy Drugs Discharged into Rivers Pose a Risk to the Environment and Human Health? An Overview and UK Case Study ', Journal of Hydrology, vol. 348, no. 1-2, pp. 167-175 . https://doi.org/10.1016/j.jhydrol.2007.09.054 Johnson, A C, Jürgens, M D, Williams, R J, Kümmerer, K, Kortenkamp, A & Sumpter, J P 2008, ' Do Cytotoxic Chemotherapy Drugs Discharged into Rivers Pose a Risk to the Environment and Human Health? : An Overview and UK Case Study ' Journal of Hydrology, vol 348, no. 1-2, pp. 167-175 . DOI: 10.1016/j.jhydrol.2007.09.054