American Journal of Preventive Medicine
American Journal of Preventive Medicine > 2001 > 20 > 2 Supplement 1 > 16-66
American Journal of Preventive Medicine > 2001 > 21 > 4 Supplement 1 > 48-65
American Journal of Preventive Medicine > 2001 > 21 > 4 Supplement 1 > 66-88