[Letter: Benzidine in feces once more].
D000611:Aminobiphenyl Compounds; D001560:Benzidines; D005243:Feces / Q000032:analysis*; D005767:Gastrointestinal Diseases / Q000175:diagnosis
D000611:Aminobiphenyl Compounds; D001560:Benzidines
Benzidin i faeces nok en gang