TY - JOUR T1 - Sleep 1980 JF - Journal of Neurology, Neurosurgery & Psychiatry JO - J Neurol Neurosurg Psychiatry SP - 479 LP - 479 DO - 10.1136/jnnp.45.5.479 VL - 45 IS - 5 AU - JD Parkes Y1 - 1982/05/01 UR - http://jnnp.bmj.com/content/45/5/479.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -