HLA-B and toxic epidermal necrolysis: Of the 57 patients with allopurinol-induced cADRs, 49 patients carried the HLA-B*58:01 allele (85.9%), and 8 patients that did not carry the HLA-B*58:01 allele were categorized as follows: 1 SJS/TEN case (1.75%), 5 DRESS cases (8.77%) and 2 MPE cases (3.51%) (Table 1).