Bone marrow origin of endothelial cell progenitor cells responsible for postnatal vasculogenesis in physiological and pathological neovascularization - Asahara, T; Masuda, H; Takahashi, T; Kalka, C; Pastore, C; Silver, M; Kearne, M; Magner, M; Isner, JM (Circulation Res, 1999)