PRISMA	Preferred Reporting Items for Systematic Reviews and Meta- Analyses
PNI	Peripheral nerve injuries
PEG	Polyethylene glycol
CAPs	Compound action potentials
CMAPs	Compound muscle action potentials
MB	Methylene blue
2PD	Static two-point discrimination test
SWM	Semmes–Weinstein monofilament test
MRCC	Medical Research Council Classification
RCT	Randomized controlled trial