I went to Johns Hopkins was diagnosed with Anti-Mag Neuropathy, a rare autoimmune disease, and got a second opinion at the Mayo Clinic, which confirmed my diagnosis. I find both places to be top notch when dealing with rare conditions. They also have expertise in treating these conditions. My local neurologist had not heard of Anti-Mag neropathy, if I would stopped with them my diagnosis would have been idiopathic (unknown cause) neuropathy.