Comparisons of EPC levels according to the presence and timing of target-lesion restenosis at one year.

EPC, endothelial progenitor cell; MNCs: mononuclear cells. Timing of restenosis: early restenosis, within 3 months; late, restenosis within 4–12 months.EPC，即内皮祖细胞（endothelial progenitor cell）；MNCs：单核细胞（mononuclear cells）。再狭窄的时间分类：早期再狭窄为发病3个月内的再狭窄；晚期再狭窄为发病4~12个月内的再狭窄。