Mesh : Administration, Inhalation Adolescent Adrenal Cortex Hormones / administration & dosage Adrenergic beta-2 Receptor Agonists / administration & dosage Adult Age Factors Albuterol / administration & dosage adverse effects Asthma / drug therapy Child Drug Therapy, Combination Female Formoterol Fumarate / administration & dosage Global Health Humans Maintenance Chemotherapy Male Middle Aged Practice Guidelines as Topic Risk Factors Severity of Illness Index Terbutaline / administration & dosage adverse effects Young Adult