FCGR2A and Guillain-Barre syndrome: Moreover, in a study that investigated the association of CD1 and FCGR2A gene polymorphisms with Guillain-Barré syndrome susceptibility, Zhang et al. indicated that FCGR2A gene polymorphisms may contribute to GBS risk in Caucasians and revealed a certain trend toward significance in the association of the exon 2 of the CD1E gene with GBS in Caucasians [23].