title: [Patch testing: historical aspects].
abstract: This article reviews the key points in the history of patch testing, which spans more than a century, starting with the first description of the method by J. Jadassohn in 1895. Special attention is paid to the contribution of French schools in this field, which led to the foundation of the Groupe d'études et de recherches en dermato-allergologie (GERDA).
authors.affiliation: Service de dermatologie, université catholique de Louvain, 30, Clos Chapelle-aux-Champs, UCL3033, 1200 Bruxelles, Belgique. Jean-marie.Lachapelle@uclouvain.be
authors.forename: J-M
authors.initials: JM
authors.lastname: Lachapelle
mesh_terms: D017449:Dermatitis, Allergic Contact / Q000175:diagnosis; D049673:History, 20th Century; D006801:Humans; D010328:Patch Tests / Q000266:history*; D012955:Societies, Medical / Q000266:history