q?,,S@@3] 0ЏgH =eЏ23 Feb 2007 12:33treatmentdiseasetfreqment%14.0g%8.0g%8.0gDisktreatlabcaselabreatlab Z2 Z2freqZ2 Z2caselabwLgw0wYesNoFtreatlabwLgw0w&Intervention 1Intervention 2Control