1. Pew research center, social networking fact sheet. www.pewinternet.org/fact-sheets/social-networking-fact-sheet/.
2. Apple health kit information page. www.apple.com/ios/whats-new/health/.
3. EPIC microsystems electronic medical record. www.epic.com/.
4. Apple research kit information page. www.apple.com/researchkit/?cid=wwa-us-kwg-iphone-com.