% Bibliography for hypothesis h-SDA-2026-04-26-gap-20260426-002803-06-csf-serum-nfl-ratio-discriminates-active-transcy-78bf5dfd5c % Title: CSF/Serum NfL Ratio Discriminates Active Transcytosis from Passive BBB Breakdown in Neurodegeneration % Generated: 2026-04-28T15:21:30Z