http://www.drKoop.com/
http://www.drSpock.com/
http://www.HealthCentral.com/
http://www.HealthScout.com/
http://www.HealthSquare.com/
http://www.InteliHealth.com/
http://www.MedicineNet.com/
http://www.PDR.net/
http://www.WebMD.com/
The Merck Manual of Medical Information: Home Edition
http://www.merckhomeedition.com/
