RT Journal Article SR Electronic T1 Hospital acquired pneumonia JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 180 OP 184 DO 10.7861/clinmedicine.1-3-180 VO 1 IS 3 A1 Wei Shen Lim A1 John T Macfarlane YR 2001 UL http://www.rcpjournals.org/content/1/3/180.abstract AB