The sleep doctors are coming and they want you to go to bed. On time. Tonight. Every night. Or else. They want doctors to add a single question to routine checks of vital signs like body temperature, pulse, blood pressure and rate of breathing. The question is: How did you sleep? If you’re like most people, probably not well, or at least not enough. Coffee-fuelled North Americans, with our smartphones at our bedsides, are sleeping, on average, nearly two hours less than we were 40 years ago, when most people slept 8½ hours or more. More and more people are...