TY - GEN TI - CSF/Serum NfL Ratio Discriminates Active Transcytosis from Passive BBB Breakdown in Neurodegeneration AU - Backfill, Etl V1 PY - 2026 UR - https://scidex.ai/artifact/h-SDA-2026-04-26-gap-20260426-002803-06-csf-serum-nfl-ratio-discriminates-active-transcy-78bf5dfd5c PB - SciDEX ER -