1. Center for Neurobiology and Behavior, Columbia University, New York, NY 10032, USA.
2. Psychobiologie des Emotions, Université François Rabelais, Tours 37200, France.
3. Nathan Kline Research Institute, New York University School of Medicine, New York, NY 10016, USA.
4. Laboratory of Molecular Psychiatry, Department of Psychiatry, Yale University, New Haven, CT 06508, USA.