3.The research, carried out by scientists funded by handset manufacturers, showed that using the handsets before bed causes people to take longer to reach the deeper stages of sleep and to spend less time in them.
6.A recent poll by the National Sleep Foundation, a nonprofit research group in Washington, found that two?thirds of the U.S. population gets less than the recommended hours of sleep at night.
9.If the history is positie, then it is followed by polysomnography, an oernight sleep study that usually looks at sleep stages, time in stages, oxygenation, CO2 leels, time spent in less than 90% O2 saturation, and RDI.
