Asthma is the commonest chronic disease in children and a major reason for admissions to hospital, yet inadequate asthma control is present in 26% to 45% of children, states a review <a href="http://www.cmaj.ca/embargo/cmaj071638.pdf">http://www.cmaj.ca/embargo/cmaj071638.pdf</a> in CMAJ (Canadian Medical Association Journal) www.cmaj.ca.