Prophylactic use of low-dose urodilatin for prevention of renal impairment following liver transplantation: a randomised placebo-controlled study. - Langrehr,J.M.; Kahl,A.; Meyer,M.; Neumann,U.; Knoop,M.; Jonas,S.; Steinmüller,T.; Bechstein,W.O.; Frei,U.; Forssmann,W.G.; Neuhaus,P. (Clin Transplantation, 1997)