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RRs (95% CIs) for all-CVD mortality from internal comparisons, by quantiles of dioxin exposure within each study. The exposure categories are not necessarily equivalent across studies (Table 2). The IARC study (Vena et al. 1998) includes the Dutch study (Hooiveld et al. 1998) and an earlier version of the Hamburg study (Flesch-Janys et al. 1995). The BASF study (Ott and Zober 1996) presented the RR only for a 1-μg/kg increase in estimated TCDD dose.
