1. Gastroenterology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal
2. Faculty of Medicine University of Coimbra Coimbra Portugal
3. Gastroenterology Department Centro Hospitalar de Leiria Leiria Portugal
4. CIMAGO, Faculty of Medicine University of Coimbra Coimbra Portugal
5. Laboratory of Microbiology, Faculty of Pharmacy University of Coimbra Coimbra Portugal
6. CIEPQPF, Faculty of Sciences and Technology University of Coimbra Coimbra Portugal
7. Pathology Department Centro Hospitalar e Universitário de Coimbra Coimbra Portugal