Erhardt, A., Ising, M., Unschuld, P. G., Kern, N., Lucae, S., Holsboer, F., & Keck, M. E. (2006). Responsiveness of the hypothalamic-pituitary-adrenocortical system in patients with panic disorder. Biological Psychiatry, 59(8 Suppl. S), 200S-200S.