I remember reading that the reason for long shifts at hospitals, for doctors or nurses, is that most mistakes are made during hand-over. The thing had a study

I remember reading that the reason for long shifts at hospitals, for doctors or nurses, is that most mistakes are made during hand-over. The thing had a study cited, I'm sorry I cannot find the source, so the hospitals optimize for minimal hand-over. I would think they also did a control study on mistakes made during the last few hours of shifts when care providers feel the strongest effect of sleep deprivation, but I don't remember that being compared.