['HAZLETON', 'LABORATORIES', 'AMERICA,', 'INC.', '9200', 'LEESBURG', 'TURNPIKE,', 'VIENNA,', 'VIRGINIA', '22160', 'USA', '642-165', '=', '§', '+', 'UD50', 'Study', 'At', 'termination', '(Day', '14),', 'a1]', 'surviving', 'rats', 'were', 'sacrificed', 'by', 'carbon', 'dioxide', 'asphyxiation', 'and', 'necropsied.', 'The', 'necropsy', 'included', 'examination', 'of', 'at', 'least', 'the', 'following', 'tissues:', 'brain', 'intestines', 'pituitary', 'stomach', 'thyroid/parathyroids', 'pancreas', 'esophagus', 'kidneys', 'trachea', 'adrenals', 'thymus', 'urinary', 'bladder', 'heart', 'ovaries', 'lung', 'uterus', 'liver', 'testes', 'spleen', 'Observations', 'were', 'recorded.', 'If', 'deaths', 'occurred,', 'necropsies', 'were', 'also', 'performed', 'on', 'those', 'animalis.', 'Statistical', 'Analyses', 'The', 'mortality', 'data', 'were', 'analyzed', 'separately', 'for', 'the', 'males,', 'the', 'females,', 'and', 'for', 'the', 'sexes', 'combined', 'using', 'a', 'modified', 'Behrens-Reed-Muench', 'Method.', 'Statistical', 'references', 'are', 'appended', 'to', 'this', 'report.', 'Raw', 'Data', 'and', 'Final', 'Report', 'Storage', 'All.', 'raw', 'data', 'and', 'the', 'final', 'report', 'are', 'stored', 'in', 'the', 'archives', 'of', 'Hazleton', 'Laboratories', 'America,', 'Inc.', '2T24£008']