What is ISABEL?
a sophisticated paediatric clinical decision-making support system designed as a near-patient working tool for doctors, nurses and health care workers
An analysis of the system was recently published (pdf)
It's free for physicians to create an account. the system is easy and kinda fun to use. YOu type in free twxt descriptions of the signs and symptoms, and the system attempts to develop a differential diagnosis.
It's easier to use than the "gold standard" decision support tool DXplain -- but I wonder about how it does the parsing of the free text entries ... what if I spell things wrong?