Lee K, Parkhurst WJ, Xue J., Ozkaynak AH, Neuberg D., Spengler JD.
Bibliographic info:
Journal of Air Waste Manag. Assoc. 2004, March, Vol 54, n° 3, pp 352-359

That study was conducted in Nashville (TN) : during six weeks, measurements using passive ozone samplers were made on a group of school children aged 10 to 12 to estimate the outdoor/indoor /personal ozone exposure. Personal ozone exposure depends of the time spent indoors and outdoors.