Derivation Web

source_874f9b53e29b4f71

# Source literature boundary memo

## Research question

Across retrieved fact-level receipts for gut_microbiome, which endpoints show directionally favorable versus null/non-convergent signals, and what matched PICO remains untested?

## Selection criteria

The source-literature fallback selected gut_microbiome because the domain snapshot exposed enough fact-backed, topic-overlapping papers. The …