Grape seed proanthocyanidins induce pro-oxidant toxicity in cardiomyocytes. - Shao,Z.H.; Vanden Hoek,T.L.; Xie,J.; Wojcik,K.; Chan,K.C.; Li,C.Q.; Hamann,K.; Qin,Y.; Schumacker,P.T.; Becker,L.B.; Yuan,C.S. (Cardiovasc Toxicol, 2003)