Apple is giving $49 Apple Watches to seniors who qualify for a new heart study — here's how to sign up (AAPL)

· Seniors who are selected to participate in a new health study will be able to buy an Apple Watch for $49 at Best Buy.
· The study, organized by Apple and Johnson & Johnson, aims to find out whether Apple Watches can reduce the risk of stroke and detect atrial fibrillation early.
· It's one of the largest randomized digital...