HLA-DQB1 and Guillain-Barre syndrome: Subgroup analyses stratified by ethnicity (Asian and Caucasian) demonstrated no significant association between the HLA-DQB1*060x polymorphism and the risk for GBS in Asians (OR: 1.78, 95% CI: 0.74–4.28, P = 0.20) or Caucasians (OR: 1.12, 95% CI: 0.85–1.47, P = 0.41) (Fig 6B).