Scammers- they played this recorded message, left on my answering machine: "This is the return call you have requested regarding the back brace commercial that you saw on TV, which is covered by your insurance. Press 1 now to be connected to one of our agents. Or press 2 if you no longer wish to receive the information you called about."
I'm guessing that the caller ID number is spoofed, so don't waste your time calling it back.