Survey mode effects linked to unit nonresponse and screening procedures were estimated in a study of self-reported tobacco, alcohol, and illicit drug use. Two samples of the same population were drawn ...
An illustration of the various elements of the overall Mars Sample Return effort. Credit: NASA/JPL-Caltech WASHINGTON — NASA has confirmed that one scenario for the cost of its Mars Sample Return (MSR ...
Conflicting findings are often reported in microbiome association studies, which could be due to insufficient sample sizes and numerous confounders. A new study, utilizing two large-scale human ...
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