Three men died on Tuesday after inhaling toxic gases while working at a refinery near the Sardinian city of Cagliari...The Saras refinery where the incident occurred is one of the biggest in Europe...Italy has the worst record for workplace deaths in Europe...In the first nine months of 2008, the only figures released so far, 779 people died in workplace accidents, about one every seven hours. Experts believe the actual figures could be even higher, as many accidents involve migrant workers who are not included in the calculations as they work off company books.