TABLE 1.

Overview of experimental design.

Study	Subjects	Outcome
1	C57BL/6J CON = 12 M & 15 F	Morphine Sensitization
	C57BL/6J CVSS = 14 M & 11 F
	BALB/cJ CON = 11 M & 14 F
	BALB/cJ CVSS = 11 M & 14 F
2	C57BL/6J CON = 11 M & 11 F	Morphine Consumption
	C57BL/6J CVSS = 15 M & 12 F
	BALB/cJ CON = 15 M & 11 F
	BALB/cJ CVSS = 14 M & 14 F
3	C57BL/6J CON = 9 M & 5 F	Acute Stress CORT Response
	C57BL/6J CVSS = 8 M & 6 F
4	C57BL/6J CON = 6 M	Prefrontal Cortex miRNA
	C57BL/6J CVSS = 5 M

CON = control; CVSS = chronic variable social stress; M = male; F = female; CORT = corticosterone.