While RALGDS was mapped, its contributory cis-eQTLs were mapped around ABO, which has been suggested to mediate COVID-19 pathogenesis via glycosylation of downstream targets and colocalized in others’ studies, underscoring the complexity of mapping eQTLs (Hernandez Cordero et al. 2021; Wang et al. 2021). The gene discussed is ABO; the disease is COVID-19.