Divers Alert Network http://www.diversalertnetwork.org/
A non-profit international organization, with its emergency hotline, provides dive safety and medical information, medical research programs, first aid training programs, emergency oxygen equipment, and affordable accident insurance.
Diving Medicine Online http://scuba-doc.com/
Comprehensive information about diving and undersea medicine for the non-medical diver, the non-diving physician and the specialist. Online physicians and consultants answer questions about diving medical problems.