American Journal of Preventive Medicine
American Journal of Preventive Medicine > 1998 > 14 > 3 > 217-223
American Journal of Preventive Medicine > 2000 > 18 > 4 > 339-342
American Journal of Preventive Medicine > 2002 > 22 > 4 > 228-233
American Journal of Preventive Medicine > 2002 > 23 > 2 > 73-81