TABLE 1.

Proportions of BEP and BER rats identified in experiments 1 and 2.

Experiment 1
Phenotype	Cohort 1 (N = 70)	Cohort 2 (N = 30)
BER	14/70(20%)	8/30(27%)
BEP	21/70(30%)	8/30(27%)
Experiment 2
Phenotype	Cohort 1 (N = 20)	Cohort 2 (N = 30)	Cohort 3 (N = 29)
BER	3(15%)	7(23%)	6 (21%)
BEP	3(15%)	9(30%)	6 (21%)

All rats for experiments 1 and 2 arrived in the lab on postnatal 60, and all testing for both experiments began on postnatal day 67, following 1 week of acclimation to housing conditions.