RT Journal Article SR Electronic T1 Medical deaths in pregnancy JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 11 OP 12 DO 10.7861/clinmedicine.8-1-11 VO 8 IS 1 A1 Catherine Nelson-Piercy A1 Michael de Swiet A1 Gwyneth Lewis YR 2008 UL http://www.rcpjournals.org/content/8/1/11.abstract AB