RT Journal Article SR Electronic T1 Henoch–Schönlein purpura JF Archives of disease in childhood - Education & practice edition JO Arch Dis Child Educ Pract Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 1 OP 8 DO 10.1136/adc.2004.066035 VO 93 IS 1 A1 E J Tizard A1 M J J Hamilton-Ayres YR 2008 UL http://ep.bmj.com/content/93/1/1.abstract AB