American Journal of Preventive Medicine
American Journal of Preventive Medicine > 1999 > 16 > 1 Supplement 1 > 47-56
American Journal of Preventive Medicine > 1999 > 16 > 1 Supplement 1 > 1-5
American Journal of Preventive Medicine > 1999 > 16 > 1 Supplement 1 > 23-29