PSEN1 and Lewy body dementia: Significant associations between DLB and variants within CHRFAM7A (CHRNA7-FAM7A fusion protein), SCARB2 (scavenger receptor class B member 2), BCHE (butyrylcholinesterase), PSEN1 (presenilin 1), and NOS2 (nitric oxide synthase 2) have also been detected, although the evidence for these loci is conflicting and further replication is required [26,31].