Researchers from ChildrensPhila and Penn Perelman report that specialized lung cells appear in the developing fetus much earlier than previously thought httpow.lyEbC530nKUC8Â

Researchers from @ChildrensPhila and @Penn Perelman report that specialized lung cells appear in the developing fetus much earlier than previously thought: http://ow.ly/EbC530nKUC8 

Researchers from @ChildrensPhila and @Penn Perelman report that specialized lung cells appear in the developing fetus much earlier than previously thought: http://ow.ly/EbC530nKUC8 

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