What percentage of patients with Guillain-Barre syndrome (GBS) don't have albuminocytologic dissociation (high levels of protein and normal cell counts) in their spinal fluid? What percentage have don't have decreased reflexes?

•  50% with no albuminocytologic dissociation
•  10% without decreased reflexes  

Both of which are generally considered classic findings of GBS

Source

Yuki, N. and Hartung, H. "Guillain-Barre Syndrome"  NEJM.  14 June 2012.