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Effect of exogenous VEGF on cell viability. Cells were seeded at 20,000 per well on Day 0. The cells were treated with 0, 0.006, 0.06, 0.6, and 6 pg/mL concentrations of VEGF for 24 hrs. Viable cells were counted using methods described previously. Results indicate mean viable cell counts ± SE. Asterisks indicate statistical significance of P ≤ 0.05 (n = 3).
