Assessing the Documentation of Social Needs in Electronic Health Records' Unstructured Data: A Collaboration of Johns Hopkins Health System and Kaiser Permanente. - Elham Hatef; Masoud Rouhizadeh; Claudia Nau; Fagen Xie; Ariadna Padilla; Lindsay Joe Lyons; Christopher Rouillard; Mahmoud Abu-Nasser; Hadi Kharrazi; Jonathan P. Weiner; Douglas Roblin (AMIA, 2021)