HLA-A and toxic epidermal necrolysis: Apart from the HLA risk alleles of SCARs related to beta-lactam antibiotics, the results from this study found that the HLA-A*11:01 and HLA-A*02:07 alleles were more common in the controls and the general Thai population (Nakkam et al., 2018; Satapornpong et al., 2020) than in the cases, suggesting that they may protect against beta-lactam antibiotics-related SJS/TEN in this study.