Table 1.

Number of mice from arrival at the Scripps Research Institute through completion of progressive ratio testing including percent meeting acquisition criteria. Attrition after acquisition was mainly due to loss of patency

		Arrived	Survived Surgery	Survived Recovery	Completed Acquisition	Failed to Meet Criteria	Pct Meeting Criteria	Extinction	Reacquisition	Dose Response	Progressive Ratio
Low Responders	BTBR T+ tf/J	20	19	17	14	5	64	5	4	3	3
	FVB/NJ	40	35	34	24	18	25	6	1	1	0
	LG/J	28	24	17	17	4	76	13	8	7	4
	LP/J	32	26	24	22	12	45	9	4	4	3
High Responders	C57BL/6J	58	49	44	36	8	78	24	12	10	5
	C57BR/cdJ	20	13	13	13	3	77	10	4	4	2
	I/LnJ	19	16	15	15	0	100	14	10	10	10
	P/J	19	18	17	16	6	63	8	4	2	1