Table 2. Summary of plasma cytokine levels.

Cytokine concentraion (pg/ml)	Baseline	In mission	P1	P2	P3	P4
	Mean ± SE	Mean ± SE	Mean ± SE	Mean ± SE	Mean ± SE	Mean ± SE
IL-2	1.67 ± 1.63	0.22 ± 0.15	1.98 ± 0.58	1.83 ± 1.68	1.41 ± 0.59	1.16 ± 0.66
IFN-γ	9.49 ± 1.40	6.37 ± 0.23	12.51 ± 6.14	8.45 ± 1.32	12.62 ± 5.10	13.02 ± 4.33
TNF-α	2.37 ± 0.40	1.85 ± 0.32	3.52 ± 1.33	2.26 ± 0.26	2.69 ± 0.52	1.86 ± 0.44

No significant differences between the indicated time point and baseline.