RT Journal Article SR Electronic T1 Clinician's guide to sleep medicine JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 377 OP 377 DO 10.7861/clinmedicine.2-4-377 VO 2 IS 4 A1 David Parkes YR 2002 UL http://www.rcpjournals.org/content/2/4/377.abstract AB