Preston-Martin, Susan; Bartsch, Helmut; Pignatelli, Brigitte; Ohshima, Hiroshi; Wahrendorf, Jurgen; Preston-Martin Susan; Department of Preventive Medicine University of Southern California; Bartsch Helmut; Unit of Environmental Carcinogens and Host Factors International Agency for Research on Cancer; Pignatelli Brigitte; Unit of Environmental Carcinogens and Host Factors International Agency for Research on Cancer; Ohshima Hiroshi; Unit of Environmental Carcinogens and Host Factors International Agency for Research on Cancer; Wahrendorf Jurgen; Division of Biostatistics and Field Studies International Agency for Research on Cancer