title: The letters of William Stewart Halsted and John Chalmers DaCosta.
authors.forename: T O
authors.initials: TO
authors.lastname: Cheng
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009449:Neurocirculatory Asthenia / Q000266:history*; D014481:United States; D014956:Writing