http://www.webmd.com/

http://www.yourdiagnosis.com/

http://www.myelectronicmd.com/

http://www.wrongdiagnosis.com/diagnosis/online.htm

http://www.diagnosispro.com/

http://www.medical-library.org/mddx_index.htm

http://symptoms.webmd.com/

http://www.myelectronicmd.com/step2.php

http://www.yourdiagnosis.com/yourdiagnosis/start_diagnosis.htm

http://www.cureresearch.com/diagnosis/online.htm