The Big Sleep (1946 film) E. Jackson were completely eliminated. Because of the two versions created by the re-shooting, there is a substantial difference in content of some twenty minutes between them, although the difference in running time is two minutes. Novelist Raymond Chandler said Martha Vickers (Carmen) overshadowed Lauren Bacall (Vivian) in their scenes together, which led the producers to delete much of Vickers' performance to enhance Bacall's. The re-shot, re-edited and revised "The Big Sleep" was finally released on 23 August 1946. The cinematic release of "The Big Sleep" is regarded as more successful than the 1945 pre-release version (see below), even though
Sleep medicine by pathophysiologic mechanism, as far as possible, rather than by primary complaint. Training in sleep medicine is multidisciplinary, and the present structure was chosen to encourage a multidisciplinary approach to diagnosis. Sleep disorders often do not fit neatly into traditional classification; differential diagnoses cross medical systems. Minor revisions and updates to the ICSD were made in 1997 and in following years. The present classification system in fact follows the groupings suggested by Nathaniel Kleitman, the "father of sleep research," in his seminal 1939 book "Sleep and Wakefulness". The revised ICSD, ICSD-R, placed the primary sleep disorders in the subgroups (1)