00288nam a2200061Ia 4500245002900000260017700029583002000206  aEPIDEMIOLOGICAL BULLETIN  bPan American Health Organization (PAHO), Pan American Sanitary Bureau, Regional Office of the World Health Organizationa525 Twenty-Third Street, NW, Washington, DC 20037US  c3/1/04kCECILYJ