Challenges and solutions to employing natural language processing and machine learning to measure patients' health literacy and physician writing complexity: The ECLIPPSE study. - William Brown III 001; Renu Balyan; Andrew J. Karter; Scott A. Crossley; Wagahta Semere; Nicholas D. Duran; Courtney R. Lyles; Jennifer Y. Liu; Howard H. Moffet; Ryane Daniels; Danielle S. McNamara; Dean Schillinger (J. Biomed. Informatics, 2021)