Muhammad Ali and his family never seriously considered donating the boxing great's brain for research, according to the doctor who treated him.
"Not really," was Dr. Abe Lieberman's answer when he was asked Monday if submitting the brain for research was discussed.
Lieberman said he didn't think boxing contributed to Ali's contraction of Parkinson's disease but he couldn't be "a hundred percent" certain.
The doctor spoke at a news conference at the Muhammad Ali Parkinson Center at the Barrow Neurological Institute in Phoenix.
Lieberman was among those who diagnosed Ali in 1984. The doctor said he believes Ali had the disease earlier, when he fought Larry Holmes in 1980.
Ali thought the Holmes fight did serious damage.
In an interview, Ali said that if he had known "Holmes was going to whip me and damage my brain, I would not have fought him. But losing to Holmes and being sick are not important in God's world."
Asked Monday if Ali blamed boxing for the disease, Lieberman said the fighter didn't think that way. He said Ali never regretted his boxing career and, as a devout Muslim, believed it was God's will that he experience the illness and help others to combat it.