Mesh : Administration, Inhalation Adrenal Cortex Hormones / administration & dosage Adrenergic beta-2 Receptor Agonists / administration & dosage Adult Air Pollution, Indoor / analysis prevention & control Anti-Asthmatic Agents / administration & dosage therapeutic use Asthma / blood physiopathology psychology therapy Child, Preschool Humans Immunotherapy / methods Medication Therapy Management / standards trends Practice Guidelines as Topic Quality of Life Respiratory Function Tests / methods Severity of Illness Index