title: On the persistence of positive patch test reactions to balsam of Peru, turpentine and nickel.
mesh_terms: D001453:Balsams / Q000009:adverse effects*; D003877:Dermatitis, Contact / Q000175:diagnosis; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009532:Nickel / Q000009:adverse effects*; D010568:Peru; D012882:Skin Tests; D011795:Surveys and Questionnaires; D013997:Time Factors; D014425:Turpentine / Q000009:adverse effects*
chemical_list: D001453:Balsams; D009532:Nickel; D014425:Turpentine