Hello @grandmael, I thought I would share this reference while we wait for other members to share their experience.

-- Electrodiagnostic Testing of Large Fiber Polyneuropathies: A Review of Existing Guidelines:
https://journals.lww.com/clinicalneurophys/Abstract/2020/07000/Electrodiagnostic_Testing_of_Large_Fiber.2.aspx
@casey1329, @jeanniem and others may have some experience or thoughts on large fiber polyneuropathy to share with you.