I like to use
www.mayoclinic.com. They have comprehensive overview articles designed for lay-people. very well written and easily understood. They are also extremely comprehensive and print in a format that translates to a printer very easily.
No I don't import these into AC, I suppose I could. For example it's frankly easier to google "mayoclinic.com irritable bowel syndrome" and it brings me right to the site so I can print the article in a click or two.
