1. From the Division of Nutrition, Centers for Disease Control and Prevention, Atlanta, Ga (D.S.F.); the Department of Biochemistry, North Carolina State University, Raleigh (J.D.O., E.J.J.); the Milwaukee Veterans Administration Medical Center, Milwaukee, Wis (J.J.B.); and St. Luke’s Hospital, Milwaukee, Wis (A.J.A., J.A.W.).