Coroner David Crerar issued a final report Tuesday into the death of 31-year-old Natasha Harris, concluding that the mother of eight died from a heart attack. He said the large amount of Coca-Cola she drank likely led to metabolic imbalances that gave rise to her heart problems, adding that Coke was likely a "substantial factor" in her death. A New Zealand food industry association on Wednesday rejected a coroner's call to add health warnings to soft-drink labels.