00317nam a2200073Ia 450000500170000024500290001726001770004658300200022320260716043519.0  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