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Emily Agree Johns Hopkins Bloomberg University School Public Health, Dpt of Population Dynamics 615 North Wolfe Street, Rm E4646 21205-2179 Baltimore MD U.S.A Tel: 1 (410) 955 46 05 / Fax: 1 (410) 955 07 92 Email: eagree@jhsph.edu George Alter University of Michigan ICPSR Institute for Social Research MI 48106-1248 Ann Arbor USA Tel: 1 (734) 615 7652 / Fax: 1 (734) 647 8700 Email: altergc@umich.edu Webpage: http://www.icpsr.org/ICPSR/staff/alter.html Flavia Andrade University of Illinois at Urbana-Champaign Department of Kinesiology and ...