This edition provides primary care physicians a thorough review of sleep medicine. Articles include: overview of sleep; obstructive sleep apnea; central sleep apnea; insomnia; narcolepsy and disorders of excessive somnolence; parasomnias; restless legs syndrome and periodic limb movement disorder; circadian sleep disorders; sleep deprivation; medications; sleep in patients with medical disorders and neurologic and psychiatric disorders; pediatric sleep disorders; sleep among women; and sleep in the elderly.