Practical issues in the evaluation of monitoring techniques: need for validation, quality assurance and establishment of baseline levels.
D002273:Carcinogens / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D006801:Humans; D009152:Mutagenicity Tests; D009153:Mutagens / Q000032:analysis*; D011786:Quality Control; D012016:Reference Values
D002273:Carcinogens; D009153:Mutagens