The independence of this group is dubious. AAPM is headquartered in the DC area for a reason - they are government and big corporate shills. Who butters their bread to the tune of $10 million plus per annum? A quote directly from their website:

"To best represent medical physics, the AAPM has worked to establish a close and cooperative working relationship with numerous government bodies and organizations including the Congress, federal and state agencies, related professional societies and a range of medical providers, corporations and suppliers."

Wow, that's a truly independent bunch.