1. Department of Internal Medicine; Center of Biomedical Research Network in Epidemiology and Public Health; Virgen del Rocío University Hospital; Seville Spain
2. Department of Internal Medicine; University of Cincinnati College of Medicine; Cincinnati Ohio USA
3. Veterans Administration Medical Center; University of Cincinnati College of Medicine; Cincinnati Ohio USA
4. Division of Foodborne, Waterborne and Environmental Diseases; National Center of Emerging and Zoonotic Infectious Diseases; Center for Disease Control and Prevention; Atlanta Georgia USA
5. Department of Parasitology, Ecology and Genetics; Institute of Tropical Diseases and Public Health of the Canary Islands; University of La Laguna; Canary Islands Spain
6. Department of Medical Parasitology; CMDT; Institute of Hygiene and Tropical Medicine; New University of Lisbon; Lisbon Portugal
7. Department of Biological Sciences; University of Cincinnati; Cincinnati Ohio USA
8. Departments of Medicine and Pathology; Albert Einstein College of Medicine; Bronx New York USA