Doctors in 2005 operated again on Clinton to remove scar tissue and fluid that had built up after his bypass surgery.

CNN: Bill Clinton, fresh out of hospital, eager to go back to work

In 2004, after Duke University surgeons operated on thousands of patients using instruments inadvertently washed in used hydraulic fluid instead of detergent, Duke attorneys filed an action to recover costs against one of the patients who sued.

CNN: Bring medical misdeeds into the light