Thromboxane a2 (txa2) does not contribute to the contractile response of human umbilical artery (hua) strips to 5-hydroxytryptamine (5-ht) - De Moraes, S; Cavalcante, M T; Carvalho, A J C; Mathias, Roberto Simão (Reuniao Anual da Federacao de Sociedades de Biologia Experimental, 1996)