Search Results Use the search box below to revise your search, or start a new search. Studies (4) Variables Publications Your query returned 4 studies. Series results are grouped under the most relevant study. Ungroup series results to view all results. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. Hispanic Established Populations for Epidemiologic Studies of the Elderly (EPESE) Disabling Process Study: 2001-2002 (ICPSR 36203) Ottenbacher, Kenneth 2. Hispanic Established Populations for Epidemiologic Studies of the Elderly (EPESE) Frailty Study: 2006-2009 (ICPSR 36321) Ottenbacher, Kenneth; Graham, James 3. Medicare Health Outcomes Survey (HOS), 1998-2014 (ICPSR 23380) United States Department of Health and Human Services. Centers for Medicare and Medicaid Services 4. National Academy of Sciences-National Research Council Twin Registry (NAS-NRC Twin Registry), 1958-2013 [RESTRICTED] (ICPSR 36234) Gatz, Margaret; Butler, David A.