1. World Health Organization (WHO)who.int2018-08-29eHealth at WHO
http://www.who.int/ehealth/en/
2. Information and Communication Technology–Enabled Person-Centered Care for the “Big Five” Chronic Conditions: Scoping Review
3. The eHealth Enhanced Chronic Care Model: A Theory Derivation Approach
4. Medical DictionaryMedical-dictionary.thefreedictionary20092018-08-29FarlexPartnershttps://medical-dictionary.thefreedictionary.com/patient+portal