A comprehensive list of tests for PN is at
www.lizajane.org.
A
Skin Punch Biopsy test
(not done in many facilities,
but a mail-order kit is available from Johns Hopkins Hospital
Baltimore MD, 21205, USA call for instructions -
dept of Neurology 1-410-955-2227)
is the 'gold standard' for small-fiber, sensory, PN here in the USA.