While parents of children with asthma take many steps to change environmental factors to improve their child’s breathing, a study shows that they often overlook cigarette smoking in the house, one of the major triggers of asthma, Reuters reported Aug. 17. The study by Michael Cabana, M.D., a pediatrician at the University of Michigan, found that 25% of the parents surveyed had a smoker who lived in the same house as the child with asthma, but did nothing to ban smoking inside the house. The study’s findings are published in the August 2004 issue of the Journal of Allergy and Clinical Immunology.