RT Journal Article SR Electronic T1 Pregnancy in congenital and valvular heart disease JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 1803 OP 1809 DO 10.1136/heartjnl-2011-300369 VO 97 IS 21 A1 Kaleschke, Gerrit A1 Baumgartner, Helmut YR 2011 UL http://heart.bmj.com/content/97/21/1803.abstract AB