"Books in Motion." . . . . . . . . . . . "Sleep disorders" . "Sleep disorders"@en . . . "America's hidden nightmare" . "America's hidden nightmare"@en . . . . . . "An estimated 20 million people miss between one and three days of work each week because of severe, chronic, debilitating insomnia. And, as many as forty percent of Americans over the age of 60, suffer from some type of sleep apnea. In this study, Dr. Fritz investigates these alarming statistics and attempts to help readers fully understand this serious problem." . . "An estimated 20 million people miss between one and three days of work each week because of severe, chronic, debilitating insomnia. And, as many as forty percent of Americans over the age of 60, suffer from some type of sleep apnea. In this study, Dr. Fritz investigates these alarming statistics and attempts to help readers fully understand this serious problem."@en . . . . "Sleep disorders America's hidden nightmare" . "Sleep disorders America's hidden nightmare"@en . "Audiobooks" . "Audiobooks"@en .