- Tyrphostin AG 556 improves survival and reduces multiorgan failure in canine Escherichia coli peritonitis. Sevransky, J.E., Shaked, G., Novogrodsky, A., Levitzki, A., Gazit, A., Hoffman, A., Elin, R.J., Quezado, Z.M., Freeman, B.D., Eichacker, P.Q., Danner, R.L., Banks, S.M., Bacher, J., Thomas, M.L., Natanson, C. J. Clin. Invest. (1997)