MMP9 and diabetes mellitus: High blood glucose or elevated HbA1c;Typical CIDP features;Older patients;Better glycemic control;Shorter duration of diabetes;More serious imbalance;More severe axonal loss;Greater degrees of demyelination of peripheral nerves;More severe neuropathy phenotype (greater weakness, more abnormal reflexes, higher TCNS scores, more abnormal NCS);Epineurial perivascular T-cell infiltrates;Possible increased endoneurial MMP-9 immunoreactivity in sural nerve biopsy;CCM might be useful in some cases