"If society doesn't want it, I won't do it. But if people don't want it in the US or Europe, that doesn't mean it won't be done somewhere else.
"I'm trying to go about this the right way but before going to the moon, you want to make sure people will follow you."
Other surgeons were sceptical. Harry Goldsmith, a professor of neurological surgery at the University of California, Davis, said: "This is such an overwhelming project, the possibility of it happening is very unlikely. I don't believe it will ever work, there are too many problems with the procedure."
Patricia Scripko, a neurologist at the Salinas Valley Memorial Healthcare System in California, also doubted the operation would be possible, but said: "If a head transplant were ever to take place, it would be very rare. It's not going to happen because someone says 'I'm getting older, I'm arthritic, maybe I should get a body that works and looks better.'"
- Independent