Measured by percent improvement on a scale of 0-4. Subjects received a 0 for no improvement, 1 for less than twenty-five percent improvement, a 2 for twenty-five to fifty percent improvement, a 3 for fifty to seventy-five percent improvement and a 4 for greater than seventy-five percent improvement. Mean scores from all continuing 16 participants were averaged for each encounter, for a total of 8 visits. The percent improvement in mean erythema severity was calculated by comparing the change in mean scores at week 48 to mean scores assessed at baseline.