1. Expert Panel Report: Guidelines for the Diagnosis and Management of Asthma;National Asthma Education and Prevention Programme;National Institutes of Health pub no 91-3642,1991
2. International Consensus Report on Diagnosis and Management of Asthma;National Hearth Lung and Blood Institute;National Institutes of Health pub no 92-3091,1992
3. Asthma self management education. Research and implication for clinical practice;Clark;Chest,1989
4. What is compliance? International Respiratory Forum;Horne,1998