Coroner Suzanne Greenway said the 27-year-old singer, who had a history of drug and alcohol abuse, had consumed a very large quantity of alcohol before her death in July.
Greenway, speaking at an inquest Wednesday in London, said a post-mortem examination of Winehouse's body found no traces of illegal drugs. She said the huge amounts of alcohol in her system could have caused her to stop breathing and fall into a coma.
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