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Although sudden infant death syndrome (SIDS) has gone down significantly over the years -- mainly thanks to the American Academy of Pediatrics’ “Back to Sleep” campaign launched in 1992, encouraging parents to put babies to sleep on their backs -- SIDS is still the leading cause of death in infants under 12 months old in the U.S. About 1,500 infants died from SIDS in 2013, according to the Centers for Disease Control and Prevention.