In October 2004, in what immediately became a landmark paper in patient safety, Dr. Landrigan and his colleagues reported the results of their study on sleep deprivation and medical errors among interns. The AHRQ-funded study, published in the New England Journal of Medicine, revealed 36% more serious errors and 5.6 times more serious diagnostic errors among interns working a traditional schedule of more than 24 hours in a row than among interns working shorter shifts (1). We spoke with Dr.