. 2016 Aug 29;11(8):e0160731. doi: 10.1371/journal.pone.0160731

Table 2. Plaque classification score in brachiocephalic arteries from ApoE^-/- after repeated i.t. instillations of carbon black (CB) and/or lipopolysaccharide (LPS).

Group	Vehicle	Low-dose CB	High-dose CB	LPS	Low-dose CB+LPS	High-dose CB+LPS
Study 1	2.6± 0.6	1.8 ± 0.5	2.3 ± 0.4	2.5 ± 0.5	2.7 ± 0.5	2.2 ± 0.45
Study 2	2.2 ± 0.5	1.6 ± 0.3	ND	1.8 ± 0.3	ND	ND

The table presents the classification of atherosclerotic plaque in study 1 and 2 based on morphological characteristics according to the American Heart Association classification guideline [39]. Data in numeric numbers are presented as mean ± SEM calculated from a randomized and blinded scoring of same sections 3 times. The plaque score was not determined (ND) in all groups in study 2.

Table 2. Plaque classification score in brachiocephalic arteries from ApoE-/- after repeated i.t. instillations of carbon black (CB) and/or lipopolysaccharide (LPS).

Table 2. Plaque classification score in brachiocephalic arteries from ApoE^-/- after repeated i.t. instillations of carbon black (CB) and/or lipopolysaccharide (LPS).