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. 2017 Jul 7;28(5):299–307. doi: 10.1097/DER.0000000000000304

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© 2017 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Contact Dermatitis Society.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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How the potency categories are populated. This figure combines the information from the first publication11 with the present data to show the number of substances placed into each of the 6 categories.