Study Search Results Your query returned 3 results. Series results are grouped under the most relevant study. You can ungroup series results. Use the search box below to revise your search, or start a new search. Results per page: 25 50 100 Sort by: Title A-Z Released/Updated Time Period Most Cited in ICPSR Bib. Most Downloaded (?) Study Title/Investigator 1. ABC News HMO Poll, November 1995 (ICPSR 6683) ABC News 2. Community Tracking Study Household Survey, 1996-1997, and Followback Survey, 1997-1998: [United States] (ICPSR 2524) Center for Studying Health System Change 3 more results in Community Tracking Study Series 3. Health Maintenance Organizations in the United States, 1984 (ICPSR 8468) Louis Harris and Associates, Inc.