Retrieved on 2013-03-18. ↑ State Laws on Heart Attacks, Cardiac Arrest & Defibrillators ↑ Laws on Cardiac Arrest and Defibrillators ↑ Health System Improvement Act, 2007 Retrieved on 26 June 2007 ↑ "The Shocking Truth About Defibrillators". IEEE Spectrum, March 2012. Retrieved 2012-07-28. ↑ Shurlock, B (18 December 2007).