Derivation Web

source_7cbf2afd35544cae

# Source literature boundary memo

## Research question

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

## Selection criteria

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