Found in 1 comment on Hacker News
Alex3917 · 2012-10-21 · Original thread
"What is the cost-benefit ratio for a routine MRI scan every six months?"

Should I Be Tested for Cancer?: Maybe Not and Here's Why:

http://www.amazon.com/Should-Be-Tested-Cancer-Maybe/dp/05202...

(I haven't personally read this yet, but it's an entire book about exactly this question, and it's very highly reviewed.)

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