American Journal of Preventive Medicine
American Journal of Preventive Medicine > 1999 > 17 > 1 > 1-7
American Journal of Preventive Medicine > 2000 > 18 > 1 > 54-61
American Journal of Preventive Medicine > 1999 > 17 > 1 > 1-7
American Journal of Preventive Medicine > 2000 > 18 > 1 > 54-61