Cardioprotection in pigs by exogenous norepinephrine but not by cerebral ischaemia-induced release of endogenous norepinephrine. - De Zeeuw,S.; Lameris,T.W.; Duncker,D.J.; Hasan,D.; Boomsma,F.; van de Meiracker,A.H.; Verdouw,P.D. (Stroke, 2001)