title: Observation status on trial.
authors.forename: Ann M
authors.initials: AM
authors.lastname: Kolanowski
authors.forename: Toby S
authors.initials: TS
authors.lastname: Edelman
mesh_terms: D000375:Aging; D014487:Centers for Medicare and Medicaid Services, U.S.; D006801:Humans; D006278:Medicare; D019370:Observation; D014481:United States