National Jewish Health in Denver is the very highest you could go. I also went there and never had so much testing from pulmonary function to swallowing test and blood work. They may even do a bronchosopy. Mayo is also highly recommended. These other speciality clinics have been evaluated and must have all the requirements to meet expectations. They just can't say we specialize and get on the list. Where in TN do you live if you don't mind telling.