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Start Over You searched for: Format Text ✖ Remove constraint Format: Text Subject Thoracic Surgery ✖ Remove constraint Subject: Thoracic Surgery Genre Articles ✖ Remove constraint Genre: Articles Genre Excerpts ✖ Remove constraint Genre: Excerpts Genre Monographs ✖ Remove constraint Genre: Monographs Publisher National Academy of Sciences (U.S.) ✖ Remove constraint Publisher: National Academy of Sciences (U.S.)