Table 1 Timing of breath, blood and urine sampling in the first subject
Day of exposure, sample 1
Urine*At home
Breath and blood08.30
Enter exposure chamber (bicycle ergometer 2×25 minutes and a snack)09.00
Leave exposure chamber13.00
Sample 2
Breath, blood, and urine†13.15
Lunch14.00
Sample 3
Breath and blood16.00
Morning after exposure, sample 4
Urine*At home
Breath and blood08.30

  • *Timed from bedtime to morning.

  • †Timed from start to end of exposure.

  • A new subject started the schedule every 15 minutes. Snacks and lunches were nitrate-restricted and identical at clean air and wood smoke exposure