OK UtGrad
So I did a quick search to see if I could find out more about skin biopsy and steroids - only thing I found so far to confirm it was on a Veterinarian site (ie for animals - apparently they get skin biopsies as well!)
But I also came across this neurology journal site article with detailed info on skin biopsies and PN:
http://www.nature.com/nrneurol/journ...neuro0630.html
I'll post it in the PN tips thread as well.