CD1E and Guillain-Barre syndrome: In a research study conducted by Caporale et al, it was reported that individuals with the genotype CD1E*01/01 were 2.5 times more susceptible to develop GBS, while individuals with the genotypes CD1A*01/02 or CD1E*01/02 had a risk of 3.6 and 2.3 times lower, respectively (Caporale et al., 2006).