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Progenitor cell levels in emphysema. Emphysema severity was determined using CT scanning lung attenuation area. (A–C) Angiogenic hematopoietic progenitor cell subsets; (D) Endothelial cell-colony forming units (EC-CFU); (E) Endothelial progenitor cell (EPC) levels. Bars represent mean, SEM. *p < .05 versus control. #p < .05 for all subjects with emphysema versus subjects without emphysema.
