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American Journal of Preventive Medicine > 2000 > 19 > 2 > 87-93
American Journal of Preventive Medicine > 2000 > 18 > 4 > 332-338
American Journal of Preventive Medicine > 2000 > 19 > 2 > 87-93
American Journal of Preventive Medicine > 2000 > 18 > 4 > 332-338