Togias AG, Naclerio RM, Warner J, Proud D, Kagey-Sobotka A, Nimmagadda I, Norman PS, Lichtenstein LM. Demonstration of inhibition of mediator release from human mast cells by azatadine base. In vivo and in vitro evaluation. JAMA. 1986 Jan 10;255(2):225–9. PMID: 2416958.