[1] OREGON HLTH SCI UNIV, DIV NEPHROL HYPERTENS & CLIN PHARMACOL, DEPT MED, PORTLAND, OR 97201 USA
[2] UNIV WASHINGTON, DEPT MED, DIV METAB ENDOCRINOL & NUTR, SEATTLE, WA 98195 USA
[3] MCMASTER UNIV, DEPT CLIN EPIDEMIOL & BIOSTAT, HAMILTON, ON, CANADA
[4] PENN STATE UNIV, COLL HLTH & HUMAN DEV, DEPT NUTR, UNIVERSITY PK, PA 16802 USA
[5] UNIV CALIF DAVIS, MED CTR, DEPT NUTR & METAB, DIV CLIN NUTR, DAVIS, CA 95616 USA
[6] WAYNE STATE UNIV, MED CTR, DIV ENDOCRINE HYPERTENS, DETROIT, MI 48202 USA
[7] CLIN RES GRP OREGON, PORTLAND, OR USA
[8] COLUMBIA UNIV, ST LUKES ROOSEVELT HOSP, DIV ENDOCRINOL DIABET & NUTR, NEW YORK, NY USA