Hair DyesHairHair PreparationsPhenylenediaminesBeauty CultureHair FollicleBarberingHair Cells, AuditoryGloves, ProtectiveBack PainLow Back PainBackDermatitis, OccupationalMaineNeopreneFluorescent DyesHair ColorHair DiseasesHair Cells, Auditory, InnerHand DermatosesTattooingEstheticsHair RemovalColoring AgentsArylamine N-AcetyltransferaseHair Cells, VestibularVermontHair Cells, Auditory, OuterCosmeticsEpidemiologic FactorsNew Hampshire