Prolongation of pq interval as a measure of therapeutic equivalence between two formulations containing diltiazen - Della Paschoa, O E; Donzella, H; Trenk, D; Luckow, L; Pileggi, F; Chamone, Dalton de Alencar Fischer; Santos, Silvia Regina Cavani Jorge (Reun an Fed Soc Biol Exp, 1994)