Ethics committees and funding agencies often receive protocols that involve either too many or too few animals to answer the specific research question being investigated. It is evident that a greater ...

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 ...

To compensate for a power analysis based on a poor estimate of variance, internal pilot designs use some fraction of the planned observations to reestimate error ...