1. The free online dictionary.
http://www.thefreedictionary.com/interface
. Accessed 3 June 2013.
2. Wikipedia – disease registries.
http://en.wikipedia.org/wiki/Disease_registry
. Accessed 3 June 2013.
3. IMPACT RegistryTM website.
https://www.ncdr.com/webncdr/impact/
. Accessed 3 June 2013.
4. Jenkins KJ, Beekman III RH, Bergersen LJ, Everett AD, Forbes TJ, Franklin RC, Klitzner TS, Krogman ON, Martin GR, Webb CL. Databases for assessing the outcomes of the treatment of patients with congenital and paediatric cardiac disease – the perspective of cardiology. Cardiol Young. 2008;18:116.
5. Kimball R, Reeves L, Ross M, Thornthwaite W. The data warehouse lifecycle toolkit: expert methods for designing, developing, and deploying data warehouses. New York: Wiley; 1998.