Objective: We examined whether individuals allergic to PPD will tolerate PPD-free hair dyes containing PTDS. Methods: A retrospective analysis of patch-test results since October 2006 was done and ...
The PPD-free PTDS-based hair dyes were recommended to all 13 subjects of this study who were seen since January 2008. Ten of these 13 subjects used the recommended dyes, and none of these subjects ...
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