Agonist high and low affinity state ratios predict drug intrinsic activity and a revised ternary complex mechanism at serotonin 5-HT(2A) and 5-HT(2C) receptors - Egan,C.; Grinde,E.; Dupre,A.; Roth,B.L.; Hake,M.; Teitler,M.; Herrick-Davis,K. (Synapse, 2000)