Critchley, H. D., Lewis, P. A., Orth, M., Josephs, O., Deichmann, R., Trimble, M. R., et al. (2007).
Vagus nerve stimulation for treatment-resistant depression: Behavioral and neural effects on encoding negative material. Psychosomatic Medicine, 69, 17-22. doi:10.1097/PSY.0b013e31802e106d.