RT Journal Article SR Electronic T1 The history and future of intensive care units JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 694 OP 694 DO 10.7861/clinmedicine.14-6-694 VO 14 IS 6 A1 Andrew Chadwick YR 2014 UL http://www.rcpjournals.org/content/14/6/694.abstract