Smokers Lungs vs Healthy Lungs (YouTube)

Smokers Lungs vs Healthy Lungs (YouTube)

Six-second clip.

https://www.youtube.com/watch?v=TVJSmfYtXyw

Here is a list of books, including some free books, by David Bruce:

https://davidbruceblog.wordpress.com/david-bruce-books/

Check out the rest of https://davidbruceblog.wordpress.com/

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