1. Department of Medicine, Faculty of Medicine, University of Malaga, Spain
2. Centro de Investigaciones Médico-Sanitarias (C.I.M.E.S), Malaga, Spain
3. Department of Psychiatry, Iowa City Veterans Administration Medical Center, The University of Iowa, West Iowa City, IA, USA
4. Department of Neurology, Carver College of Medicine, The University of Iowa, Iowa City, IA, USA
5. The Iowa Consortium for Substance Abuse Research and Evaluation, The University of Iowa, Iowa City, IA, USA
6. Department of Endocrinology, Carlos-Haya Hospital, Malaga, Spain
7. Department of Internal Medicine, University Hospital Virgen de la Victoria, Malaga, Spain