RT Journal Article SR Electronic T1 How to choose delivery devices for asthma JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 185 OP 187 DO 10.1136/adc.82.3.185 VO 82 IS 3 A1 CHRIS O'CALLAGHAN A1 PETER W BARRY YR 2000 UL http://adc.bmj.com/content/82/3/185.abstract AB