[1] CASE WESTERN RESERVE UNIV, SCH MED, DEPT PREVENT MED, CLEVELAND, OH 44106 USA
[2] CASE WESTERN RESERVE UNIV, SCH MED, DEPT MED, CLEVELAND, OH 44106 USA
[3] CASE WESTERN RESERVE UNIV, SCH MED, DEPT BIOMETRY, CLEVELAND, OH 44106 USA
[4] RES & CONTROL DEPT, ST LUCIA, W IND ASSOC ST
[5] CTR DIS CONTROL, ATLANTA, GA USA