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1930s: Most information about the heart has been gained through experimentation by doctors trying to fight against diseases.

R

By Rick Ray

  • Stock footage ID: 26865730
Video clip length: 01:01FPS: 29.97Aspect ratio: 16:9Editorial use only. Learn more
HD$791920 × 1080MOV323.5 MB
SD$65852 × 480MOV41.8 MB

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