--on how thorough the autoimmune testing was.

Often rheumatologists test for the anti-nuclear antibody related autoimmune conditions and a number of other antibodies to specific organs (i.e., thyroid), but many are not cognizant of the antibodies specific to peripheral nerve; it usually takes going to a specialist treatment center for that.

Two links that may be helpful, so you can compare what testing you've had:

The serological paper authored by neuropathy expert Dr. Norman Latov for Quest diagnostics:

http://www.questdiagnostics.com/test...ripheralNeurop

And the Liza Jane spreadsheets, which were designed to be about as comprehensive a listing of tests for neurologic symptoms as the best minds here could come up with:

www.lizajane.org