1. A. Smith, U.S. Smartphone Use in 2015, Pew Research Center, Washington, D.C. (April 1, 2015). http://www.pewinternet.org/2015/04/01/us-smartphone-use-in-2015/ (Accessed 8 February 2017).
2. Health app use among US mobile phone owners: a national survey;Krebs;JMIR mHealth uHealth,2015
3. Fitbit, Inc. (2015), Form 10-K, U.S. Securities and Exchange Commission. http://d1lge852tjjqow.cloudfront.net/CIK-0001447599/f7a564df-cf62-4681-90a4-a3ef813b0d83.pdf?noexit=true (Accessed 8 February 2017).
4. Pitfalls in hemoglobin A1c measurement: when results may be misleading;Radin;J. Gen. Intern. Med.,2014
5. The potential of Internet of m-health Things m-IoT for non-invasive glucose level sensing;Istepanian,2011