Table 1.

The schedule of immersions and sampling.

	Samples taken
Cumulative time from the start of immersion (h:min)	Blood	Urine
−1:00	x	x
0:00 (start of immersion)	x
0:30 (end of immersion)	x
1:00	x	x
2:00	x
4:00	x	x
6:00	x	x
23:00	x	x