AE: Adverse events
AIDP :acute inflammatory demyelinating polyneuropathy
AMAN :acute motor axonal neuropathy .
AMSAN :acute motor and sensory axonal neuropathy .
BBE: Bickerstaff brainstem encephalitis
CIDP: Chronic inflammatory demyelinating polyneuropathy
CSF :cerebrospinal fluid
DS: Disability Scale
FFP: Fresh Frozen Plasma
FVC :forced vital capacity
GBS :Guillain Barre syndrome
ICU :intensive care unit.
IVIG :intravenous immunoglobulins
IVMP : IV methylprednisolone
mEGRIS :modified Erasmus GBS Respiratory Insufficiency Score
MFS :Miller Fisher Syndrome
MRC: Medical Research Council
PE :plasmapheresis
SBC: single breath count
TRF :treatment-related fluctuation,