1. Prevalence of Contact Allergy to p-Phenylenediamine in the European General Population 
Thomas L. Diepgen, Luigi Naldi, Magnus Bruze, Simone Cazzaniga, Marie-Louise Schuttelaar, Peter Elsner, Margarida Goncalo, Robert Ofenloch, Åke Svensson 
Journal of Investigative Dermatology 
Volume 136, Issue 2, Pages (February 2016)
DOI: /j.jid
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2. Figure 1
Clinical relevance of positive patch test reactions to p-phenylenediamine in hair coloring products. Algorithm of clinical relevance to contact allergy to PPD in hair coloring products. CI, confidence interval; PR, prevalence rate.
Journal of Investigative Dermatology  , DOI: ( /j.jid )
Copyright © 2015 The Authors Terms and Conditions