1. Department of Psychiatry, School of Medical Sciences, National University of Asunción, San Lorenzo, Paraguay
2. Research Department, School of Medical Sciences, National University of Caaguazú, Coronel Oviedo, Paraguay
3. Department of Psychiatry, Medical School, University of São Paulo, São Paulo, SP, Brazil
4. Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy