--Johns Hopkins foremost among them--that have at times taken a sample from the skin right above the elbow, as there were some "norming" studies done on intraepidermal nerve fiber density at this location (again, at Hopkins).

Most centers had not bothered with this as they generally treat small fiber neuropathy as a slowly ascending, distal to proximal progressing condition that will impact feet and legs first. It is worth noting, though, that while this is the most common presentation, there are others, including those that impact the upper extremities or even the trunk and face, so it is good to see that samples from places other than the leg will be more widely used.