RT Journal Article SR Electronic T1 Who's for five nine-hour shifts a week? JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 440 OP 442 DO 10.7861/clinmedicine.6-5-440 VO 6 IS 5 A1 Nicholas Horrocks A1 Roy Pounder YR 2006 UL http://www.rcpjournals.org/content/6/5/440.abstract AB