Family History Extraction From Synthetic Clinical Narratives Using Natural Language Processing: Overview and Evaluation of a Challenge Data Set and Solutions for the 2019 National NLP Clinical Challenges (n2c2)/Open Health Natural Language Processing (OHNLP) Competition

Feichen Shen   ^{1 *} , PhD ;   Sijia Liu   ^{1 *} , PhD ;   Sunyang Fu   ¹ , MSc ;   Yanshan Wang   ¹ , PhD ;   Sam Henry   ² , PhD ;   Ozlem Uzuner   ^{2, 3, 4} , PhD ;   Hongfang Liu   ¹ , PhD

¹ Division of Digital Health Sciences, Mayo Clinic, Rochester, MN, United States

² Department of Information Sciences and Technology, George Mason University, Fairfax, VA, United States

³ Department of Biomedical Informatics, Massachusetts Institute of Technology, Cambridge, MA, United States

⁴ Department of Biomedical Informatics, Harvard Medical School, Boston, MA, United States

*these authors contributed equally