I have had idiopathic full body neuropathy for more than a year now. Fortunately the pain is mostly under control with Cymbalta, Lyrica and 10 mg Oxycontin twice a day. When my neurologist ran out of ideas he suggested a teaching hospital nearby. So did my PCP. However, my wife, an RN, wanted mayo. It was a mistake. I was warned by my neurologist that the mayo clinics were "revenue motivated.". I found that to be true. The neurologists there do not know more than other neurologists as far as I can tell. They gave me a "diagnosis" that was a description of my pain symptoms and suggested treating the symptoms with the meds I was already taking. Go to some place like Hopkins, the Clevland clinic, or similar. I wish you luck and hope you find relief.