Should doctors be allowed to nap on the job?

A recent picture of a junior doctor asleep while at work in a Monterrey, Mexico hospital has sparked an online conversation about the importance of sleep for doctors. The picture was taken and posted by a blogger, who wrote, "We are aware that this is a tiring job but doctors are obliged to do their work." Doctors have responded on twitter with the hashtag #YoTambienMeDormi ("I've also fallen asleep"), posting pictures and stories about the necessity of taking short naps while working long shifts.