1. iOS. http://www.apple.com/ios [last accessed 12.11.12].
2. Android. http://www.andro-phones.com [last accessed 12.11.12].
3. Blackberry OS. http://www.androidtablets.net [last accessed 12.11.12].
4. Windows Phone. https://market.android.com/apps/MEDICAL [last accessed 12.11.12].
5. iTunes. http://www.apple.com/itunes [last accessed 12.11.12].