In comparison, levels of absolute CD19+CD27high plasma cell counts remained unchanged during the first week following admission in ambulant GBS patients without any specific treatment (5.9 ± 2.4 cells/μl vs 6.1 ± 4.2 cells/μl, n = 10, p = 0.53, data not shown). Here, CD19 is linked to Guillain-Barre syndrome.