1. Institut de Neurociències, CIBERSAM and Red de Transtornos Adictivos (RTA), Unitat de Fisiologia Animal (Facultat de Biociéncies), Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
2. Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
3. Department of Psychiatry, McLean Hospital, Harvard Medical School, Belmont, MA, USA
4. Unitat de Psicobiologia (Facultat de Psicologia), Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain