RT Journal Article SR Electronic T1 Six novel mutations in the PRF1 gene in children with haemophagocytic lymphohistiocytosis JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 643 OP 646 DO 10.1136/jmg.38.9.643 VO 38 IS 9 A1 Rita Clementi A1 Udo zur Stadt A1 Gianfranco Savoldi A1 Stefania Varotto A1 Valentino Conter A1 Carmela De Fusco A1 Luigi D Notarangelo A1 Marion Schneider A1 Catherine Klersy A1 Gritta Janka A1 Cesare Danesino A1 Maurizio Aricò YR 2001 UL http://jmg.bmj.com/content/38/9/643.abstract AB