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2 Healthdirect, Pacemaker. Last updated October 2022. Accessed May 2024.
3 Mayo Clinic – Implantable cardioverter defibrillators. Last updated August 2023. Accessed May 2024.
4 Mayo Clinic – Cardiac resynchronization therapy. Last updated July 2023. May 2024.
5 Department of Health, Medical Costs Finder. May 2024.