In its September 2001 advisory on the draft analytical blueprint for the second Section 812 prospective analysis , the SAB cited the Thurston and Ito study as a significant advance in understanding the effects of ozone on daily mortality and recommended re-evaluation of the ozone mortality endpoint for inclusion in the next prospective study ( EPA-SAB-COUNCIL-ADV-01-004 , 2001 ) .
The Thurston and Ito study helped understand the ozone .