[1] NIH,DIV EPIDEMIOL & CLIN APPLICAT,BETHESDA,MD 20205
[2] UNIV N CAROLINA,SCH PUBL HLTH,CHAPEL HILL,NC 27514
[3] UNIV N CAROLINA,LRC PROGRAM,CHAPEL HILL,NC 27514
[4] CTR DIS CONTROL,ATLANTA,GA 30333
[5] OKLAHOMA MED RES FDN,LIPID RES CLIN,OKLAHOMA CITY,OK 73104
[6] CENT ELECTROCARDIOG LAB,BIRMINGHAM,AL