HLA-A and toxic epidermal necrolysis: HLA-A*02:01/Cw*15:02 alleles are associated with an increased risk of PHT-induced SJS/TEN, HLA-B*38:01 is associated with LTG- and PHT-induced SJS/TEN, and HLA-A*11:01 is associated with CBZ-induced SJN/TEN.