Jejunoileal BypassHyperlipidemiasHypercholesterolemiaHyperlipoproteinemia Type IICholesterolAnticholesteremic AgentsReceptors, LDLCholesterol, LDLCholesterol, DietaryLipoproteins, LDLHydroxymethylglutaryl-CoA Reductase InhibitorsXanthomatosisApolipoproteins BEpichlorohydrinAzetidinesArteriosclerosisDiet, AtherogenicLipidsLipoproteinsTriglyceridesSimvastatin