From the Departments of Pharmacology (G.E.C., A.C.M., M.H.C.C., Z.B.F., D.N., R.C.T.) and Histology and Embryology (T.M.T.Z.), Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil; and Clinical Research Institute of Montreal (G.E.C., R.M.T., E.L.S.), University of Montreal, Montreal, Canada. (At 2004-04)
