There could be thingst the liver that could directly then impact the liver, like cancer. We need to scane the liver to see if there's a blockage or we may have to do a biopse. And just before you put a patient onto medication that could cause liver disease, you may want a base line to see what the liver is currently at. Some of these liver function tests also change with age and with sex. So billy reuben should be first tome we should have a look at, don't you think?