Figure 1. Growth rate of human bone marrow-derived plastic-adherent cells. (A) Plastic-adherent cells harvested separately from bone marrows of 14 donors were seeded at a density of 1.3 × 103 cells/cm2 (passage 1). Cells were counted after 3 days (left panel) and 6 days (right panel) post-seeding using a hemocytometer, and the fold increase in cell number was calculated. Donors are color-coded as shown in Table