Table 1.

Experimental Design

Experiment	Drug Regimen	Age at Drug Onset	Age at Behavioral Testing	Age at Sacrifice
Experiment 1	Preventative	8 months	11½–12 months	15 months
Experiment 2	Preventative	8–9 months	11½–12 months	13 months
Experiment 3	Therapeutic	17 ½–18 months	18–19 months	19–20 months