Directly from their page:
"DAN is a 501(C)(3) nonprofit organization that provides emergency medical information and assistance for underwater diving injuries, and promotes and supports underwater diving research and education, particularly as it relates to the improvement of diving safety, medical treatment and first aid. DAN is supported by more than 200,000 fellow divers with a further 60,000 international divers supporting DAN World, DAN Brasil, DAN Europe, DAN Japan, DAN Asia-Pacific and DAN Southern Africa...."
Read more at: http://dan.org/about/welcome.asp
