This story on Yahoo! suggests that regular tests for British GPs are being introduced in response to the Harold Shipman case. http://uk.news.yahoo.com/21022007/325/gps-face-regular-tests-shipman-case.html While the notorious doctor of death is no doubt a handy hook for journalists, the article does rather imply that his killing spree was the result of being a bit rusty. If only he'd kept up to date with best practice in the medical profession, he wouldn't have killed 250 people.
In unrelated medical news, we learn that surgeons improve their performance if they regularly play video games. As my friend the Hoffmeister has correctly pointed out, however, avid gamers shouldn't immediately jump to the conclusion that they can have a go at brain surgery.