Table 1.

Total cell output from human stromal FPC and non-FPC CFU

Cell type	CFU size	Cell yield	Length of experiment (days)
FPC	Large	1.8 ± 0.3 × 1011	217.7 ± 25.4
	Small	3.4 ± 0.6 × 106	57 ± 9.5
Non-FPC	Large	9.5 ± 0.3 × 108	98.3 ± 16.2
	Small	2.4 ± 0.6 × 106	36.3 ± 4.5

Number of patient samples (n = 3) from 10 to 15 large and 20 to 30 small individual stromal CFU were serially passaged until senescence. Results are reported as means ± SEM. CFU, colony-forming units; FPC, fluorescent persistent cells; SEM, standard error of the mean.