RT Journal Article SR Electronic T1 The search for new asthma phenotypes JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 333 OP 336 DO 10.1136/adc.2008.143636 VO 94 IS 5 A1 J Henderson A1 R Granell A1 J Sterne YR 2009 UL http://adc.bmj.com/content/94/5/333.abstract AB