Analysis of Variance Azathioprine--therapeutic use Blood Glucose--metabolism Body Mass Index C-Peptide--blood Cyclosporine--therapeutic use Fatty Acids, Nonesterified--blood Female Glucose Tolerance Test Glycerol--blood Humans Insulin--blood Ketone Bodies--blood Lactates--blood Liver Transplantation--physiology Male Middle Aged Prospective Studies Pyruvates--blood Pyruvic Acid Reference Values Tacrolimus--therapeutic use