@BOOK{NAP9930, author = "Institute of Medicine", title = "Reliability of Medicare Hospital Discharge Records: Report of a Study", doi = "10.17226/9930", url = "https://nap.nationalacademies.org/catalog/9930/reliability-of-medicare-hospital-discharge-records-report-of-a-study", year = 1977, publisher = "The National Academies Press", address = "Washington, DC" }