Lower calorie snack choice at vending machine pays off.
D002149:Energy Intake; D005509:Food Dispensers, Automatic / Q000191:economics*; D005518:Food Preferences; D005522:Food Services / Q000191:economics*; D006293:Health Promotion / Q000191:economics*; D006801:Humans; D009316:National Institutes of Health (U.S.); D014481:United States