Slide 4. Some background. The "Seven Pillars" Approach: Crossing the Patient Safety-Medical LiabilityOn April 13, 2012, Timothy McDonald, MD, JD, made this presentation at the meeting of the National Advisory Council. Image: The covers of two Institute of Medicine (IOM) reports are shown: To Err is Human, and Wall of Silence.Previous Slide Contents Next Slide Current as of August 2012 Internet Citation: Slide 4. Some background.: The "Seven Pillars" Approach: Crossing the Patient Safety-Medical Liability. August 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/news/events/nac/2012-04-nac/mcdonald/mcdonald4.html