CD68 and ischemia: Even at later stages after infarction PMNs remained confined to vessel lumina, despite extensive presence of CD45-positive leukocytes (not shown) which mainly consisted of CD163-negative (not shown) and CD68-positive macrophages and activated microglia and a moderate fraction of CD3-positive T-cells (while CD20-positive B-cells were virtually absent) and aberrant dilated appearance of vessels (Supplementary Fig. 4), indicative of ischemia.