Figure 1. Distribution of fluorosis prevalence by age cohort. *The birth years cover the period from March 18 in the first year to March 17 in the second, e.g., March 18, 1985, to March 17, 1986.
Figure 1. Distribution of fluorosis prevalence by age cohort. *The birth years cover the period from March 18 in the first year to March 17 in the second, e.g., March 18, 1985, to March 17, 1986.