1. Department of Medical and Surgical Sciences and Advanced Technologies “G.F. Ingrassia”, Section of Neurosciences University of Catania Catania Italy
2. Center of Anthropological Research of the Teko Guaraní Gutierrez Bolivia
3. Department of Experimental and Clinical Medicine, Infectious and Tropical Diseases Unit University of Florence Florence Italy
4. Hospital Universitario Hernández Vera Santa Cruz Bolivia