I go to Johns Hopkins & am extremely pleased with them.
There have been mixed emotions and quite a few negatives
regarding Mayo Clinics. They seem to be persnikkety
about who they will treat, and don't test across the spectrum.
(See www.lizajane.org for a complete list of tests for PN.)
Cleveland Clinic has a fairly good reputation.
There is, also Cornell-Weill & The Jack Miller Center - to think about.
Both are exemplary in treating for PN.