Influence of Cocoa Flavanols and Procyanidins on Free Radical-induced Human Erythrocyte Hemolysis - Carl L. Keen; Catherine L. Kwik-Uribe; Sun H. Kim; Tomoko Yamaguchi; Heidrun B. Gross; Roberta R. Holt; Qin Yan Zhu; Derek D. Schramm (Clinical and Developmental Immunology)