Approximately 16 million Americans have COPD.
from https://www.nih.gov/news-events/news-releases/study-funded-nih-supports-optimal-threshold-diagnosing-copd
from
https://healthnews010.tumblr.com/post/185856133133
from https://johnher1.blogspot.com/2019/06/study-funded-by-nih-supports-optimal.html
from
https://johnher10.tumblr.com/post/185856339152
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