1. Department of Gastroenterology, Hepatology and Endocrinology; Hannover Medical School; Hannover Germany
2. German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig; Hannover Germany
3. Department of Internal Medicine; Clinics Hospital, Federal University of Paraná; Curitiba Brazil
4. Serology Lab, Clinics Hospital, Federal University of Paraná; Curitiba Brazil