Barriers to Patient Portal Access and Use: Evidence from the Health Information National Trends Survey. Sherine El-Toukhy, Alejandra Méndez, Shavonne Collins, Eliseo J. Pérez-Stable. The Journal of the American Board of Family Medicine Nov 2020, 33 (6) 953-968; DOI: 10.3122/jabfm.2020.06.190402 . Share ....