3c61a8dfa">Skip to main content
Have a background question? These textbooks can be a better source than PubMed for epidemiology, pathophysiology, signs & symptoms, and other background information.
If you see a Licenses Exceeded message when you try to access an online book, wait about 15-20 minutes then try again.
Please use the Log Out or Exit icons to free up the license immediately for the next user.