--besides the Latov/Quest clinical application paper:
http://www.questdiagnostics.com/hcp/...eralNeurop.htm
--there are also the Poncelet protocols:
http://www.aafp.org/afp/980215ap/poncelet.html
The Neuropathy Association website also has a breakdown by type and presenting symptoms:
http://www.neuropathy.org/site/PageServer