- Efficacy of angiotensin-converting enzyme inhibitors and beta-blockers in the management of left ventricular systolic dysfunction according to race, gender, and diabetic status: a meta-analysis of major clinical trials. Shekelle, P.G., Rich, M.W., Morton, S.C., Atkinson, C.S., Tu, W., Maglione, M., Rhodes, S., Barrett, M., Fonarow, G.C., Greenberg, B., Heidenreich, P.A., Knabel, T., Konstam, M.A., Steimle, A., Warner Stevenson, L. J. Am. Coll. Cardiol. (2003)