Concentrations in the FTD group were as follows: Ng22, 114.0 (117.5) pg/ml; Ng36, 171.1 (75.2) pg/ml; SNAP-25tot, 49.2 (16.7) pM; SNAP-25aa40, 8.2 (3.4) pM; and synaptotagmin-1, 197.1 (78.9) pM. This evidence concerns the gene SLC44A4 and frontotemporal dementia.