DEEPEN: A negation detection system for clinical text incorporating dependency relation into NegEx.
Saeed MehrabiAnand KrishnanSunghwan SohnAlexandra M. RochHeidi SchmidtJoe KestersonChris BeesleyPaul R. DexterC. Max SchmidtHongfang LiuMathew J. PalakalPublished in: J. Biomed. Informatics (2015)
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