RT Journal Article SR Electronic T1 IgE mediated food allergy: when is food challenge needed? JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 555 OP 556 DO 10.1136/adc.2004.057372 VO 90 IS 6 A1 P W Ewan A1 A T Clark YR 2005 UL http://adc.bmj.com/content/90/6/555.abstract AB