Consistency of conversion of GR to urinary ITC in 3 high converter phenotypes who were tested on 5 to 7 occasions (selected from the 131 determinations shown in Fig. 1A). Consistency of conversion of GR to urinary ITC in 3 high converter phenotypes who were tested on 5 to 7 occasions (selected from the 131 determinations shown in Fig. 1A). Each determination involved a single oral administration of 200 μmol of GR and measurement of 24-hour DTC excretion. The results are expressed as percent of administered dose. The intervals between tests varied from a few days to 2.5 years. Jed W. Fahey et al. Cancer Prev Res 2012;5:603-611 ©2012 by American Association for Cancer Research