Table 2.

Number of cells in the cohort

	< Tc − Ts	12.5 hr	12.5–60 hr	P4	P22
Original cohort size	1 hr	1 hr	2 hr	2 hr	2 hr
Fraction included	P + Q	Q	Q	Q	Q
Average number of cells/sector ± SEM	9.54 ± 3.56	6.92 ± 0.23	6.31	3.56	0.64