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Comparative growth kinetics of LP and HP MC3T3‐E1 cells. Wells in 12‐well plates were seeded with 5 × 103/cm2 and cell counts were assessed daily for 12 days (◆, passage 25 cells; ▪, passage 42 cells). The population doubling time for both curves was 15 h. The data represent the mean of sextuplicate samples ± the standard error of the mean. *Significance (P < 0.04).
