In this March 17, 2015 photo, Phil Dworsky visits with his parents, Dorothy and Bill Dworsky, at their home in San Francisco. Each time an elder Dworksy opens the refrigerator, closes the bathroom door or lifts the lid on a pill container, tiny sensors in their home make notes on a digital logbook, which the younger Dworsky monitors daily on his smartphone. (AP Photo/Eric Risberg)
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