Approximately 70 million people in the United States are affected by a sleep problem. About 40 million Americans suffer from chronic sleep disorders, and an additional 20-30 million are affected by intermittent sleep-related problems. However, an overwhelming majority of sleep disorders remain undiagnosed and untreated. Some of the most common ones are insomnia, restless legs syndrome, parasomnias, circadian rhythm disorders, excessive daytime sleepiness, night terrors, sleep apnea, periodic limb movement disorder, and narcolepsy. Long standing sleep disturbances can lead to nonproductive...