Drug has no effect: p<0.05 for migration speed with wells as n 5.6%; migration speed with experiments as n 5.7%; 24-h percent closure with experiments as n 5.2% Drug has no effect, conditions vary more between experiments (SD 0.15): p<0.05 for migration speed with wells as n 14.8%; migration speed with experiments as n 4.9%; 24-h percent closure with experiments as n 4.8% Drug slows migration by 20%: p<0.05 for migration speed with wells as n 92.6%; migration speed with experiments as n 81.5%; 24-h percent closure with experiments as n 68.0%