"Interns working five or more extended-duration shifts per month reported more attentional failures during lectures, rounds, and clinical activities, including surgery and reported 300% more fatigue-related preventable adverse events resulting in a fatality."
Sure, but they're killing a lot more people than the docs getting sleep.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1705824/
"Interns working five or more extended-duration shifts per month reported more attentional failures during lectures, rounds, and clinical activities, including surgery and reported 300% more fatigue-related preventable adverse events resulting in a fatality."