RT Journal Article SR Electronic T1 Characterisation of diverse PRF1 mutations leading to decreased natural killer cell activity in North American families with haemophagocytic lymphohistiocytosis JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 137 OP 144 DO 10.1136/jmg.2003.011528 VO 41 IS 2 A1 S Molleran Lee A1 J Villanueva A1 J Sumegi A1 K Zhang A1 K Kogawa A1 J Davis A1 A H Filipovich YR 2004 UL http://jmg.bmj.com/content/41/2/137.abstract AB