Figure 2. Blood hexafluoroisopropanol (HFIP) concentrations (mean plus/minus SE). Concentrations of unconjugated HFIP (squares, measured before sample hydrolysis) and total HFIP (circles, measured after sample hydrolysis with beta-glucuronidase/sulfatase) were determined in a subset of four patients. Apparent outliers were not excluded from the mean data.