GRN and Alzheimer disease: Hence, the range of values was −3.5 to 10.4 pg/mL (mean 3.5 ± 3.4 pg/mL) for control subjects, −1.0 to 9.6 pg/mL (mean 4.4 ± 2.7 pg/mL) for all FTLD subjects without GRN mutations, 2.0–5.6 pg/mL (mean 3.9 ± 0.9 pg/mL) for patients with GRN mutations and −2.2 to 7.4 pg/mL (mean 3.1 ± 2.5 pg/mL) for AD subjects.