Kabat-Zinn, J., et al. (1992). Effectiveness of a meditation-based stress reduction program in the treatment of anxiety disorders. American Journal of Psychiatry, 149, 936-943. Full text.
Conclusions (from the abstract): A group mindfulness-based meditation training program can effectively reduce symptoms of anxiety and panic and can maintain these reductions in patients with generalized anxiety disorder, panic disorder, or panic disorder with agoraphobia.