Levy, M.L.

asthma control patient asthma control treatment study exacerbation spirometry respir symptom airway measure trial function severity quality lung function disease health assessment outcome fev 1 practice change asthma severity measurement recommendation children level effect response future risk diary questionnaire value guideline sputum group allergy score future society airway obstruction nitric oxide asthma exacerbations corticosteroids adult finition population analysis chest therapy task force american inhaled marker flammation management subject obstruction medication reference force criteria diagnosis immunol corticosteroid research information oxide nitric reliever use journal method report hrqol monitoring visit thorax count