RT Journal Article SR Electronic T1 Pericardial effusions in healthy lowlanders after acute ascent to high altitude JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 539 OP 540 DO 10.1136/hrt.2005.065375 VO 92 IS 4 A1 A A R Thompson A1 J K Baillie A1 M Toshner A1 S R J Maxwell A1 D J Webb A1 J B Irving YR 2006 UL http://heart.bmj.com/content/92/4/539.abstract AB