title: Careful observations and flawed conclusions.
authors.forename: H
authors.initials: H
authors.lastname: Steinberg
mesh_terms: D001379:Azathioprine / Q000627:therapeutic use*; D003424:Crohn Disease / Q000188:drug therapy*; D006801:Humans; D015122:Mercaptopurine / Q000627:therapeutic use*
chemical_list: D015122:Mercaptopurine; D001379:Azathioprine