American Journal of Preventive Medicine
American Journal of Preventive Medicine > 1999 > 16 > 1 > 1-9
American Journal of Preventive Medicine > 2000 > 19 > 2 > 94-98
American Journal of Preventive Medicine > 1999 > 16 > 1 > 1-9
American Journal of Preventive Medicine > 2000 > 19 > 2 > 94-98