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  1. Placebo predictions

    Giving patients placebo pills for a week before they begin to participate in trials of antidepressants can help clinicians gauge how well they will respond to the actual medication.

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  2. Tech

    The ups and downs of routing fluids on chips

    A new way to build microscale pipes in three dimensions boosts the sophistication of chips that manipulate fluids to perform chemical reactions and other tasks.

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  3. Unusual tumor is contagious in dogs

    A type of cancer in dogs is transferred from animal to animal by exchange of cancer cells.

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  4. Stress rate revised for Vietnam vets

    A reanalysis of data from a 1988 study of Vietnam veterans finds that 19 percent developed war-related post-traumatic stress disorder, a smaller proportion than had previously been estimated.