http://observer.com/2016/07/space-radiation-devastated-the-lives-of-apollo-astronauts/
Sounds bad for any trips beyond LEO.
A startling new study has revealed that a troubling number of the lunar astronauts from NASA’s Apollo program are suffering high mortality rates due to heart disease. The cause? Exposure to high levels of deep space radiation during their trip to the Moon.
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The number of cardiovascular disease-related deaths among the deep space astronauts were significantly higher.
The rate among astronauts who never flew is 9%. Among low-Earth orbiting astronauts, its 11%. For the men who travelled to the Moon, a staggering 43%, or 4-5 times higher than their less-travelled colleagues.
Sounds bad for any trips beyond LEO.