# Acknowledgments

This work is supported by the National Library of Medicine under Award 
No. 1R01LM014306 and 4R00LM013001.

We are grateful to the authors for making their software tools publicly
available.

* [Bllip parser](https://github.com/BLLIP/bllip-parser)
* [CheXpert labeler](https://github.com/stanfordmlgroup/chexpert-labeler)
* [MedSpaCy](https://github.com/medspacy/medspacy)
* [MetaMap](https://www.nlm.nih.gov/research/umls/implementation_resources/metamap.html)
* [NegBio](https://github.com/bionlplab/negbio2)
* [NLTK](https://www.nltk.org/)
* [spaCy](https://spacy.io/)
* [Stanford CoreNLP](https://stanfordnlp.github.io/CoreNLP/)
* [Stanza](https://stanfordnlp.github.io/stanza/)