Figure 3
From: An effective strategy to prevent allopurinol-induced hypersensitivity by HLA typing

Comparison of the incidences of allopurinol hypersensitivity reactions with those in a previous retrospective study. Incidences of severe cutaneous adverse reaction (SCAR) were significantly reduced in the prospective study as compared with the previous retrospective study. †From ref. 15. ‡Treated with a tolerance induction protocol or alternative medications.20