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Algorithms of test interpretation in non-invasive breath tests for calculation of the enzymatic capacity. It is shown an exemplary plot of breath recovery (13CO2/12CO2 ratio) after administration of 2 mg/kg 13C-labeled methacetin. #1- Maximum of delta-over-baseline (DOB); #2DOB at 15 minutes; #3- DOB at 30 minutes; #4- DOB at 60 minutes; #5- Cumulative recovery by calculation of area under DOB curve.
