1. Centre of Informatics and Systems (CISUC), University of Coimbra, 3030-290 Coimbra, Portugal
2. Escola Superior de Tecnologia e Gestão de Oliveira do Hospital (ESTGOH), Polytechnic Institute of Coimbra, 3030-199 Coimbra, Portugal
3. Instituto Superior de Engenharia de Coimbra (ISEC), Polytechnic Institute of Coimbra, 3030-199 Coimbra, Portugal