Meditation, medication, patches, gum, counseling, and cold turkey: You probably know a smoker who has tried—and failed—to kick the habit with one of those methods. It turns out that your cancer stick–puffing friends and relatives might be a bit more successful if you (or someone) forked over some cash. That’s what the results of a new study published in the journal BMJ suggest. After researchers in the U.K. dangled up to $1,200 in shopping vouchers in front of each...
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