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5) CNRI/Photo Researchers Inc, Steve Pomberg/WebMD
6) Interactive Medical Media LLC
7) Michelle Del Guercio / Photo Researchers, Inc.
8) Dr. P. Marazzi / Photo Researchers, Inc.
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10) Dr. Jean Claude Amoric /ISM
11) Lucianne Pashley/Age Fotostock
12) Watney Collection/Phototake
13) Dr P. Marazzi / Photo Researchers, Inc.
14) Dr P. Marazzi / Photo Researchers, Inc.
15) Eye of Science / Photo Researchers, Inc.
16) Medical Body Scans / Photo Researchers, Inc.
17) Scott Camazine / Phototake
18) Biophoto Associates / Photo Researchers, Inc.
20) Scott Camazine / Phototake
21) Dr P. Marazzi / Photo Researchers, Inc.
22) Alan & Linda Detrick / Photo Researchers, Inc
23) James Gathany / CDC
24) Roger Sutcliffe/OSF
25) Eddy Gray / Photo Researchers, Inc.
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Reviewed by Renee A. Alli, MD on October 13, 2019
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