TABLE 1.

Mouse demographics.

Experiment 1	(3 months)
CB7BL/6J	n = 72 (36 M, 36 F)
Experiment 2	Young Adult (4–7 months)	Middle Aged (10–15 months)	Aged (20+ months)
FVB	n = 9 (8 M, 1 F)	n = 20 (12 M**, 8 F)
Swiss Webster (SW)	n = 14 (6 M*, 8 F)
129	n = 11 (4 M, 7 F)
C57BL/6J	n = 12 (6 M*, 6 F*)	n = 17 (10 M#, 7 F*)	n = 7 (2 M, 5 F)
Experiment 3	(3 months)
C57BL/6J	n = 20 (10 M, 10 F)

Each asterisk (*) represents a single mouse with plasma Δ9THC concentrations outside ±2 SDs from the group mean and removed from analyses.

Each hash mark (#) represents a single mouse with brain Δ9THC concentrations outside ±2 SDs from the group mean and removed from analyses.