When the whole is more than the sum of its parts.
Lanier
B Q
BQ
D000280:Administration, Inhalation; D000305:Adrenal Cortex Hormones / Q000008:administration & dosage / Q000627:therapeutic use*; D000318:Adrenergic beta-Agonists / Q000008:administration & dosage / Q000627:therapeutic use*; D000420:Albuterol / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000627:therapeutic use*; D001249:Asthma / Q000188:drug therapy*; D004359:Drug Therapy, Combination; D006801:Humans; D000068299:Salmeterol Xinafoate
D000305:Adrenal Cortex Hormones; D000318:Adrenergic beta-Agonists; D000068299:Salmeterol Xinafoate; D000420:Albuterol