Some bitter news about sugar

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Coca-Cola co-opts the National Press Foundation while the World Health Organization tries — again — to issue dietary guidelines with strict limits on sugar, Tabitha M. Powledge writes in her weekly science blogs roundup: "So you can see why the sugar people are in a panic, and why Coke has seized an opportunity to lobby journalists." Also, integrity at the Office of Research Integrity, gene therapy for HIV infection, and President Obama amid some potted plants.