HLA-DRB1 and Parkinson disease: We noticed that the allele frequencies of HLA-DRB1*1202, DRB1*1312, and DRB1*1454 were also higher in PD patients than in healthy controls, However, the difference was not significant after Bonferroni adjustment, the statistic power in those alleles are at moderate level (0.5< statistic Power <0.75).