The nickel content of chalk--cause of contact dermatitis?
D003877:Dermatitis, Contact / Q000209:etiology*; D009783:Dermatitis, Occupational / Q000209:etiology*; D005178:Faculty; D005260:Female; D006801:Humans; D008875:Middle Aged; D009532:Nickel / Q000009:adverse effects* / Q000032:analysis
D009532:Nickel