HLA-C and toxic epidermal necrolysis: This is the first report of an association between nevirapine-induced SJS/TEN and HLA-C*04:01, but is consistent with previous studies in black African (OR = 5.17) [14], Thai (OR = 3.79) [15], and Chinese (OR = 3.23) [16] populations that have reported an association with HLA-C*04 nevirapine-cutaneous reactions.