title: Patch testing with copper sulphate.
mesh_terms: D003300:Copper / Q000009:adverse effects*; D019327:Copper Sulfate; D005189:False Positive Reactions; D006801:Humans; D009532:Nickel / Q000009:adverse effects; D010328:Patch Tests; D012882:Skin Tests
chemical_list: D003300:Copper; D009532:Nickel; D019327:Copper Sulfate