1. Faculty of Medicine, University of Coimbra, Coimbra, Portugal;
2. Laboratory of Biostatistics and Medical Informatics, Faculty of Medicine, University of Coimbra (LBIM, FMUC), Coimbra, Portugal;
3. Institute for Biomedical Imaging and Life Sciences, Faculty of Medicine, University of Coimbra (IBILI FMUC), Coimbra, Portugal;
4. Dual Disorders Unit, Psychiatric Service, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal;
5. Department of Gastroenterology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal