CD27 and Guillain-Barre syndrome, familial: We determined the absolute peripheral blood count of total memory B cells (CD3−CD19+CD27+) and plasmablasts (CD3−CD19+CD27+CD38highCD20−) in AMAN, AIDP and HC (Fig. 3a), and found that the absolute count of total memory B cells in patients with AMAN and AIDP were higher than that in the HC (Fig. 3b); while the absolute count of plasmablasts was raised only in the AMAN group (Fig. 3c).