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Comparative growth of LP and VHP MC3T3‐E1 cells. Wells of 12‐well plates were seeded with 5 × 103/cm2 and cell counts were assessed daily for 5 days (◆, passage 30 cells; ▪, passage 65 cells). The population doubling time for p30 and p65 cells was 15 and 20 h, respectively. The data represent the mean of sextuplicate samples ± the standard error of the mean. *Significance (P < 0.01).
