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SAN FRANCISCO (AP) – Apple wants to encourage millions of iPhone owners to register as organ donors through a software update that will add an easy sign-up button to the health information app that comes installed on every smartphone the company makes.

CEO Tim Cook says he hopes the new software will help ease a longstanding donor shortage. He told The Associated Press that the problem hit home when Apple co-founder Steve Jobs endured an “excruciating” wait for a liver transplant in 2009.

Apple is adding the option to enroll in a national donor registry by clicking a button within the iPhone’s Health app, which can be used manage a variety of health and fitness data. The software will come to all U.S.-based iPhones when the company updates its mobile operating system this fall.

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