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SAO PAULO, May 28 (Reuters) - Brazil's state-run oil company Petrobras was rigorous in calculating its first-quarter earnings and should not revise them, company board member Walter Mendes said on Thursday.
Petroleo Brasileiro SA, as the company is official known, has been plagued by the biggest corruption scandal in the country's history. (Reporting by Aluisio Pereira; Writing by Reese Ewing)