title: The use of serum drug concentrations in a private ambulatory clinic and its affiliated health maintenance organization.
mesh_terms: D000328:Adult; D000554:Ambulatory Care Facilities; D004077:Digoxin / Q000097:blood*; D064420:Drug-Related Side Effects and Adverse Reactions; D005260:Female; D006279:Health Maintenance Organizations; D006403:Hematologic Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D010672:Phenytoin / Q000097:blood*; D014116:Toxicology; D014481:United States