HLA-DRB1 and cervical squamous intraepithelial neoplasia: Other European population studies have identified DRB1*0401, DRB1*0403, DQB1*0302, DQB1*0402, DQB1*0603 alleles as related to increased risk of CIN and cervical cancer, however, we were not able to repeat these findings [10–12].