Table 1.

Number of data points for each threshold measure. The table indicates the number of mice tested for each measure and includes cases where the measurement was performed but there was no measurable response (no response).

Strain	8 kHz	16 kHz	32 kHz	41.2 kHz	VsEP
B6	75 females 75 males	75 females 74 males	73 female 75 male	74 female 75 males	68 females 71 males
	150 total	149 total	148 total	149 total	139 total
B6.CAST	31 female 42 male	31 female 40 male	31 female 38 male	30 female 38 male	49 female 55 male
	73 total	71 total	69 total	68 total	104 total