Riippa I, Linna M, Rönkkö I. The Effect of a Patient Portal With Electronic Messaging on Patient Activation Among Chronically Ill Patients: Controlled Before-and-After Study. Journal of Medical Internet Research 2014;16(11):e257 View; Otte-Trojel T, Rundall T, de Bont A, van de Klundert J, Reed M..