These lesions are usually asymptomatic, but can on occasion be quite painful and of cosmetic concern7 (Figure 1). [jamanetwork.com]

These lesions are usually asymptomatic, but can on occasion be quite painful and of cosmetic concern7 (Figure 1). [jamanetwork.com]

Conclusions The HLA-DRB1*0404 allele suggests that Amerindian populations are at risk, and in this group, the Mexican population studied was affected only by human papillomavirus type 13. [jamanetwork.com]

Seventeen (85%) of 20 patients had human papillomavirus subtype 13. The data on human papillomavirus differed from reports elsewhere that described association with human papillomavirus type 32. [jamanetwork.com]

Nineteen (86%) of 22 patients were HLA-DR4 positive; 7 of them (37%) were homozygous. [jamanetwork.com]