X-ray doctor [Getty Images]

X-ray doctor — see more

X-ray doctor

E+ RapidEye

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X-ray of lung showing chest cancer — see more

X-ray of lung showing chest cancer

The Image Bank Peter Dazeley

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Man smoking electonic cigarette, cropped — see more

Man smoking electonic cigarette, cropped

PhotoAlto Agency RF Collections PhotoAlto/Frederic Cirou

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