The Mayo Clinic in Rochester, Minnesota is top ranked. Dr. Dyck and his team are of the best.

http://www.mayoclinic.org/department...w/ovc-20117067

http://www.mayoclinic.org/biographie...d/bio-20053356

Doctors would have to see your father-in-law not just via telephone and previous records. That I would think is true of any physician.

Hope you find the answer. The above is specifically the Mayo Clinic in Rochester, Minnesota. There are other Mayo Clinics in other states.