Table 2. NM exposure caused an increase in the percent extravasated RBCs in the dermis of SKH-1 hairless and C57BL/6 mice following 12–120 h of its exposure.

SKH-1
Exposure	VC	12 h NM	24 h NM	72 h NM	120 h NM
Extravasated RBCs	+	++	+++	+++	+++
C57 BL/6
Exposure	VC	12 h NM	24 h NM	72 h NM	120 h NM
Extravasated RBCs	++	+++	+++	+++	+++

+, Few (less than 10%); ++, moderate (10–30%); +++, high (more than 30%) extravasated RBCs per skin section (at 400×); vehicle control.