“…Jewell and Miller, 1998 Francis, 1990 As cited in Schardein, 1993Henwood et al, 1990Nakao et al, 1981Costlow et al, 1983Gray et al, 1985 (continues) As cited in Schardein, 1993Bimbaum et al , 1991Bimbaum et al, 1991Ebert et al, 1990Breslin et al, 1991John-Greene et al, 1985Breslin et al, 1994Breslin et al, 1994 As cited in Schardein, 1993Mirkova and Ivanov, 1981Machemer et al, 1992 As cited in Schardein, 1993Wilson, 1971 As cited in Schardein, 1993 Rat --1800 ppm…”