fetch_sources.sh downloads PharmVar per-gene zips; pgx db build adds core alleles for genes CPIC does not define (normalised against the FASTA, *1 = reference). Masks re-derived with the new variants. GeT-RM: CYP3A4 15/15, CYP2A6 7/9; all comparable genes 154/168 (CYP1A2/CYP2C8 definitions differ from GeT-RM's).