Sometimes devices resembling pacemakers, called implantable cardioverter-defibrillators (ICDs) are implanted. Biphasic defibrillation was originally developed and used for implantable cardioverter-defibrillators. Later hackers demonstrated remote control of insulin pumps and implantable cardioverter defibrillators. In these patients, primary prevention with use of implantable cardioverter-defibrillators can be considered. Unlike implantable stents, organs have complex shapes and are significantly harder to bioprint. In June 2013, it was reported that he had an implantable cardioverter-defibrillator fitted. Such "C. albicans" biofilms may form on the surface of implantable medical devices or organs. Polypropylene has been reported to degrade while in human body as implantable mesh devices. There are various types of medical implantable devices that are used for this purpose. This is an issue when device dimensions are an issue, such as in implantable devices. An implantable RFID tag or transponder can also be used for animal identification. A port is more correctly known as a "totally implantable venous access device". Such implantable GPS devices are not technically feasible at this time. Avery started the Avery Company, which made a number of implantable stimulators. Products include artificial joints, components for medical machines and implantable screws, rods and plates.