Challenges and opportunities using online portals to recruit diverse patients to behavioral trials. - Amir Alishahi Tabriz; Patrice Jordan Fleming; Yongyun Shin; Ken Resnicow; Resa M. Jones; Susan A. Flocke; Deirdre A. Shires; Sarah T. Hawley; David Willens; Jennifer Elston-Lafata (J. Am. Medical Informatics Assoc., 2019)