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Your query returned 13 studies. Series results are grouped under the most relevant study. Ungroup series results to view all 15 results.

2.
Longitudinal Study of Aging Danish Twins, 1995 (ICPSR 21041)
Christensen, Kaare; Vaupel, James W.
7.
10.
ACTIVE (Advanced Cognitive Training for Independent and Vital Elderly), 1999-2001 [United States] (ICPSR 4248)
Tennstedt, Sharon; Morris, John; Unverzagt, Frederick; et al.
13.
National Health Interview Survey, 1994: Second Longitudinal Study on Aging, Wave 3, 2000 (ICPSR 3807)
United States Department of Health and Human Services. Centers for Disease Control and Prevention. National Center for Health Statistics

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