title: Persistent insomnia in chronic hypnotic users presenting to a sleep medical center: a retrospective chart review of 137 consecutive patients.
authors.affiliation: Sleep and Human Health Institute, Albuquerque, NM 87109, USA. bkrakow@sleeptreatment.com
authors.forename: Barry
authors.initials: B
authors.lastname: Krakow
authors.forename: Victor A
authors.initials: VA
authors.lastname: Ulibarri
authors.forename: Eddie
authors.initials: E
authors.lastname: Romero