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WASHINGTON, Jan. 25 (Xinhua) -- The odds of a major depressive episode are more than double for those working 11 or more hours a day compared to those working seven to eight hours a day, according to a report published Wednesday in the online journal PLoS ONE.The authors, led by Marianna Virtanen of the Finnish Institute of Occupational Health and University College London, followed about 2,000 middle aged British civil servants and found a robust association between overtime work and depression.This correlation was not affected when the analysis was adjusted for various possible confounders, including socio-demographics, lifestyle, and work-related factors.There have been a number of previous studies on the subject, with varying results, but the researchers emphasize that it is hard to compare results across these studies because the cut-off for "overtime" work has not been standardized."Although occasionally working overtime may have benefits for the individual and society, it is important to recognize that working excessive hours is also associated with an increased risk of major depression", Virtanen said in a statement.
Chromium can be toxic and carcinogenic if ingested in large amounts.
The cold wave will bring winds and dust storms and continue to move eastward, the center said.
BEIJING, May 24 (Xinhua) -- China will launch a campaign to check health food producers over food safety concerns, the State Food and Drug Administration (SFDA) said Wednesday on its website.
A total of 42.45 million journeys were made by water during period from Jan. 8 to Feb. 16, up 1 percent year-on-year, said MOT Spokesman He Jianzhong.
来源：资阳报