This Week in PNAS

Editor's Note: Some of the articles described below are not yet available at the PNAS site, but they are scheduled to be posted some time this week.

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In Science this week: issues in reproducibility, circulating DNA predicts breast cancer relapse, and more.

Because of an autoimmune disorder, a man has been shedding live polioviruses for 28 years, according to an analysis appearing in PLOS Pathogens.

Being in a long-term collaboration can increase researchers' citation rates by 17 percent, a recent analysis says.

By analyzing tweets, Canadian researchers examine the public's view of gene patenting.