American Journal of Preventive Medicine
American Journal of Preventive Medicine > 2000 > 19 > 4 > 270-275
American Journal of Preventive Medicine > 2001 > 20 > 4 > 245-250
American Journal of Preventive Medicine > 2000 > 19 > 4 > 270-275
American Journal of Preventive Medicine > 2001 > 20 > 4 > 245-250