- Effects of a metabotropic glutamate(2/3) receptor agonist (LY544344/LY354740) on panic anxiety induced by cholecystokinin tetrapeptide in healthy humans: preliminary results. Kellner, M., Muhtz, C., Stark, K., Yassouridis, A., Arlt, J., Wiedemann, K. Psychopharmacology (Berl.) (2005)