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Summary
Public domain image from cancer.gov http://visualsonline.cancer.gov/details.cfm?imageid=2348. Cross section of a human lung. The white area in the upper lobe is cancer, the black areas indicate the patient was a smoker.
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See 206.02(b) of Compendium II: Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
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In addition to the implicit public domain status provided as a work of the United States Government, the National Cancer Institute has also explicitly licensed this photo into the public domain: http://visualsonline.cancer.gov/about.cfm
File usage
The following pages on Schools Wikipedia link to this image (list may be incomplete):
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.