Jean-Marie Lachapelle • Howard I. Maibach

2012

This concise “How to patch/prick test” rapidly reached a third edition, presumedly because of its evidence-based approach, combined with practicality. Dr. Sigfried Fregert remains the stimulus to keep this text “updated.” We are indebted to Dr. Fregert and to other founding members of the ICDRG for their prescient insights.