{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T23:45:32Z","timestamp":1792021532359,"version":"4.4.0"},"reference-count":30,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2025,1,8]],"date-time":"2025-01-08T00:00:00Z","timestamp":1736294400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Dermatitis\u00ae"],"published-print":{"date-parts":[[2025,9,1]]},"abstract":"<jats:p>\n                    <jats:underline>\n                      <jats:italic toggle=\"yes\">\n                        <jats:bold>Abstract:<\/jats:bold>\n                      <\/jats:italic>\n                    <\/jats:underline>\n                    The first ICDRG (International Contact Dermatitis Research Group) classification of patch test reactions was published in 1970. With this classification, many weak reactions were classified as allergic reactions. A second classification was therefore implemented one decade later on behalf of the ICDRG and the North American Contact Dermatitis Group. This classification was adopted by the European Society of Contact Dermatitis. Evaluation of the significance of the results of various studies on patch test reading demonstrated that a new ICDRG classification of patch test reactions was needed. A classification system should not be based on the exclusive presence\/absence of papules and vesicles, i.e., the words \u201cpossibly papules\/vesicles\u201d allow for the unavoidable variation in reading among experts. Dermatologists are not reading patch test reactions in a uniform way due to lack of a clear definition of the threshold between weak allergic and doubtful reactions. A new ICDRG classification with clarifications and modifications of the old one is presented.\n                  <\/jats:p>","DOI":"10.1089\/derm.2024.0365","type":"journal-article","created":{"date-parts":[[2025,1,8]],"date-time":"2025-01-08T14:32:31Z","timestamp":1736346751000},"page":"440-446","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":18,"title":["Clarification and Modification of the International Contact Dermatitis Research Group Classification of Patch Test Reactions on Behalf of the International Contact Dermatitis Research Group"],"prefix":"10.1177","volume":"36","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2919-3227","authenticated-orcid":false,"given":"Magnus","family":"Bruze","sequence":"first","affiliation":[{"name":"From the Department of Occupational and Environmental Dermatology, Sk\u00e5ne University Hospital, Lund University, Malm\u00f6, Sweden."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cecilia","family":"Svedman","sequence":"additional","affiliation":[{"name":"From the Department of Occupational and Environmental Dermatology, Sk\u00e5ne University Hospital, Lund University, Malm\u00f6, Sweden."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,1,8]]},"reference":[{"key":"e_1_3_1_2_2","first-page":"57","volume-title":"Giant Steps in Patch Testing. A Historical Memoir","author":"Lachapelle J-M","year":"2010","unstructured":"Lachapelle J-M. The founding and life of the International Contact Dermatitis Group (ICDRG). In: Giant Steps in Patch Testing. A Historical Memoir. SmartPractice: Phoenix, Arizona, USA; 2010;pp. 57\u201373."},{"issue":"4","key":"e_1_3_1_3_2","first-page":"287","article-title":"Terminology of contact dermatitis","volume":"50","author":"Wilkinson DS","year":"1970","unstructured":"Wilkinson DS, , Fregert S, , Magnusson B, et al. Terminology of contact dermatitis. Acta Derm Venereol., 1970; 50(4):287\u2013292.","journal-title":"Acta Derm Venereol."},{"key":"e_1_3_1_4_2","first-page":"145","volume-title":"Giant Steps in Patch Testing. A Historical Memoir","author":"Lachapelle J-M","year":"2010","unstructured":"Lachapelle J-M. Scoring, reading and interpreting positive patch test reactions: additional tests and problems of relevance. In: Giant Steps in Patch Testing. A Historical Memoir. 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Thoughts on the classification of patch test reactions with focus on the threshold between weak allergic and doubtful reactions. Dermatitis. Accepted for publication.","journal-title":"Dermatitis"},{"key":"e_1_3_1_15_2","article-title":"Are we reading patch test reactions in a uniform way? An ICDRG study","author":"Bruze M","unstructured":"Bruze M, , Ale I, , Andersen K, et al. Are we reading patch test reactions in a uniform way? An ICDRG study. Dermatitis. 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