Search Results Use the search box below to revise your search, or start a new search. Studies (3) Variables Publications Your query returned 3 studies. Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. 1. The Longitudinal Study of Older People in Anhui Province, China, 2001-2003 (ICPSR 36388) Silverstein, Merril; Li, Shuzhou 2. Medicare Health Outcomes Survey (HOS), 1998-2014 (ICPSR 23380) United States Department of Health and Human Services. Centers for Medicare and Medicaid Services 3. National Academy of Sciences-National Research Council Twin Registry (NAS-NRC Twin Registry), 1958-2013 [RESTRICTED] (ICPSR 36234) Gatz, Margaret; Butler, David A.