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[\'Edward N. Okeke (eokeke@rand.org) is a senior policy researcher in the Department of Economics, Sociology, and Statistics, RAND Corporation, in Arlington, Virginia, and a professor of policy analysis in the Pardee RAND Graduate School, in Santa Monica, California.\', \'Isa S. Abubakar is a professor of community medicine at Bayero University and Aminu Kano Teaching Hospital, both in Kano, Nigeria.\', \'Rebecca De Guttry is a doctoral fellow at the Pardee RAND Graduate School.\']
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