- Radiology Society of North Americawww.pubs.rsna.org
- The National Academies of Science, Engineering, and Medicinewww.nap.edu
- World Heart Federationwww.world-heart-federation.org
- Medline Pluswww.medlineplus.gov
- Better Health Channelwww.betterhealth.vic.gov.au
