PT - JOURNAL ARTICLE AU - Urs Frey TI - Asthma as a nonlinear complex dynamic system: a novel approach to understand the temporal behaviour of chronic asthma and its response to β-agonists AID - 10.1183/09059180.00010804 DP - 2008 Jun 01 TA - European Respiratory Review PG - 67--69 VI - 17 IP - 108 4099 - http://err.ersjournals.com/content/17/108/67.short 4100 - http://err.ersjournals.com/content/17/108/67.full SO - EUROPEAN RESPIRATORY REVIEW2008 Jun 01; 17