Exposure of mice to arsenic and/or benzo[a]pyrene does not increase the frequency of Aprt-deficient cells recovered from explanted skin of Aprt heterozygous mice. - Fischer JM; Robbins SB; Kannamkumarath SS; Al-Zoughool M; Stringer SL; Talaska G; Caruso JA; Stambrook PJ; Stringer JR (Environmental and molecular mutagenesis, 2006)