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Shepard TY, Weil KM, Sharp TA, Grunwald GK, Bell ML, Hill JO, Eckel RH.Shepard TY, et al. Among authors: eckel rh.Am J Clin Nutr. 2001 Apr;73(4):703-8. doi: 10.1093/ajcn/73.4.703.Am J Clin Nutr. 2001.PMID: 11273843Clinical Trial.