[1] UNIV TORONTO,DEPT PREVENT MED & BIOSTAT,TORONTO M5S 1A1,ONTARIO,CANADA
[2] HLTH & WELF CANADA,LAB CTR DIS CONTROL,DIV NONCOMMUNICABLE DIS,OTTAWA K1A 0L2,ONTARIO,CANADA
[3] NEW BRUNSWICK DEPT HLTH,FREDERICTON,NB,CANADA
[4] HLTH & WELF CANADA,DIV MONITORING & CRITERIA,OTTAWA K1A 0L2,ONTARIO,CANADA