title: Differential levels of stage IV sleep in a group of clinically similar chronic schizophrenic patients.
mesh_terms: D000328:Adult; D004569:Electroencephalography; D004576:Electromyography; D004585:Electrooculography; D006801:Humans; D008297:Male; D012559:Schizophrenia / Q000503:physiopathology*; D012890:Sleep; D012894:Sleep Stages; D012895:Sleep, REM