Last night I watched the 60 Minutes segment: Deception at Duke. Sadly, this well-respected institution "fudged" data related to a cancer study. On the surface, this would appear shocking.
But ... the big but is the following. A wonderful article that was published in November 2010 titled Lies, Damned Lies, and Medical Science that exposed (not Duke) research, doctors, and medical science. It states:
Much of what medical researchers conclude in their studies is misleading, exaggerated, or flat-out wrong. So why are doctors—to a striking extent—still drawing upon misinformation in their everyday practice? Dr. John Ioannidis has spent his career challenging his peers by exposing their bad science.
I recommend watching the 60 Minutes segment and reading the article. They're both fascinating, illuminating, and disturbing.