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References
Article:Effects of Chromium Supplementation on Serum High-Density Lipoprotein Cholesterol Levels in Men Taking Beta-Blockers: A Randomized, Controlled Trial
John R. Roeback, Jr.,
Khin Mae Hla,
Lloyd E. Chambless,
and Robert H. Fletcher
Ann Intern Med December 15, 1991 115:917-924; doi:10.1059/0003-4819-115-12-917