I have also heard of
David C. Cassada, MD/ Vascular Surgeon
University of Tennessee Medical Center at Knoxville.

I actually read his very good article on working as a fellow surgeon with 5 famous TOS surgeons in the country.
I live close to Memphis and have gone to St Louis to see Dr. Robert Thompson, Barnes Jewish. But then I also went to Seattle to see Dr. Johansen/Thomas and Michel Kliot.

It would be good if we network for Memphis area.

Khan