[arielzj]

These were physicians who were being paid to complete surveys - no reason to think they were more likely to select/reject this one over any of the others available to them at the time.

[nyeah]

<puzzled frown>. There's at least one reason. It's in the comment you responded to.

[overtone1000]

Apologies, that was my mistake. The subspecialties I thought weren't included were reported in detail in one of the figures, and they were some of the more optimistic groups. The result is surprising to me.

[IAmBroom]

Two: the phrase "being paid".