Curious, are there any references? I have seen zero. Of course, I see tons of ads on TV so if the Dr.'s office has TV on, that may be one source. But I am curio

Curious, are there any references? I have seen zero. Of course, I see tons of ads on TV so if the Dr.'s office has TV on, that may be one source. But I am curious about ads outside of the TV, haven't any like that in a Dr's office.