A 68-year-old woman with sleep-onset insomnia

See also review article by McMillan and colleagues on page [1499][1] and at [www.cmaj.ca/lookup/doi/10.1503/cmaj.130025][2] A 68-year-old woman, who smokes 1 package of cigarettes daily, presents with fatigue, daytime sleepiness and difficulty falling asleep at night. She reports that, for as long