Prevalence of contact allergy to metals : nickel, palladium, and cobalt in Southern Sweden from 1995–2016
Background: In 2001, the EU nickel directive was introduced to prevent contact allergy to nickel. Contact allergy to palladium and/or cobalt is often seen together with contact allergy to nickel. Objectives: To compare the contact allergy prevalence of nickel, palladium, and cobalt allergy before and after the introduction of the EU nickel directive in consecutive patients with dermatitis. Methods