. >> reporter: this is 74-year-old alan hoffman, and this is video of the first day he started a newnical trial for parkinson's disease. >> when he's walking, he doesn't walk so straight, very slow, very decreased arm swing, not much movement. >> reporter: doctors say those are all symptoms of the degenerative disease diagnosis that he got 18 years ago. >> everything i read said parkinson's would be a condition related to the cause of death but it wouldn't kill you. >> it removes the person that you have known from you in ways that you never wanted to see. >> reporter: but after years of feeling hopeless, the hoffmans say they now have reason to be hopeful. that clinical trial that alan joined dramatically changed his life. >> and it turned out to be so much more, that i think they were even surprised. >> reporter: doctors at georgetown university medical center are studying whether a leukemia drug can help parkinson's patients. they believe the medication may kill the toxic proteins in these patients' bodies, proteins that can cause brain cells to die. it can also help them produce

this is from alan hoffman, the head of government affairs, basically the pr guy over at herbalife. trades. on the other side he had to have some monster wins. >> he's enjoying it. he's relishing it. we will keep listening and reporting in. let's turn back to oil. we heard from exxon mobil and chevron earlier, both eating the estimate. chevron posting its fourth straight quarterly decline. let's ring and andrew cosgrove -- let's bring in andrew cosgrove. we have been trying to get a sense of what has been going on in the oil industry. see -- you are going to i think you are seeing a big readjustment on the cost structure. relayed that that to the companies that serve them, halliburton, baker hughes, they are the ones that are feeling the effects. they are going to deal with the second straight year of declines. >> if we compare against the we it feelsm chevron, like the more downstream you are -- more downstream you have the better off you are. both of those things better than chevron. , you do haverket the entire world -- >> one second. we want to hear everything you have to say an