Table 1. Number of animals included.

Rats operated: 31	tMCAO: 24	tMCAO rats excluded based on D3 MRI: 8			Included in analysis*
		tMCAO rats included:16	M2-treated: 8	with USPIO: 5	8
				without USPIO: 3
			PBS-treated: 8	with USPIO: 5	8
				without USPIO: 3
	Sham: 7	Sham rats excluded based on D3 MRI: 0			Included in analysis*
		Sham rats included: 7	M2-treated: 2	with USPIO: 2	2
			PBS-treated: 5	with USPIO: 5	3 (2 animals excluded because of incomplete data sets)

^*Rats that had a complete set of longitudinal MRI data.

tMCAO: transient middle cerebral artery occlusion; PBS: Phosphate buffer saline; USPIO: Ultrasmall superparamagnetic particles of iron oxide.