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1) Photo Researchers Inc./Phototake
5) Will & Deni McIntyre / Photo Researchers, Inc.
6) Medical Body Scans/Photo Researchers Inc
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10) Robert Kirk/Photodisc
11) Eric Audras/PhotoAlto
12) Peter Dazeley/Photographer's Choice
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15) Rolf Bruderer/Blend Images
17) Arthur Tilley/Taxi
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20) Thomas J Peterson/Photographer's Choice
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22) hybrid medical animation / Photo Researchers, Inc
23) Kraig Scarbinsky/Lifesize
American Heart Association
Centers for Disease Control and Prevention
National Institutes of Health
National Stroke Association
The Stroke Association
Reviewed by Neil Lava, MD on April 14, 2018
This tool does not provide medical advice. See additional information.
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