Today I am feeling better since now that I have oxygen to help me during the night. I have met with my primary card Dr. in Mpls. and he prescribed oxygen for me after viewing the test results from the testing at Mayo. The prescription that was written by a respiratory therapist at Mayo (authorized by the Doc based on the testing) for some reason unbeknownst to me would not be signed by the Dr. In all of my testing over the last 3 weeks at Mayo, and with all the doctors I had to meet with, this was my only regretful experience.