“…Both assays were carried out on the human hepatoma cell line HepG2 (Aden, Fogel, Platkin, Damjarov, & Knowles, 1979). These cells retain many of the morphological characteristics of liver parenchymal cells, many of the specialized functions such as the secretion of the major plasma proteins and express a wide variety of liverspecific metabolic enzymes (Kirkland, Kasper, Müller, Corvi, & Speit, 2008;Knasmuller et al, 2004;Knowles, Howe, & Aden, 1980;Westerink & Schoonen, 2007a, 2007b.…”