1. Meco Health Centre, Community of Madrid Health Service (SERMAS), 28880 Madrid, Spain
2. Research Group MISKC, Department of Computer Science, University of Alcala, University Campus, 28805 Alcala de Henares, Spain
3. Santa Cristina University Hospital, Community of Madrid Health Service (SERMAS), 28009 Madrid, Spain
4. Mejorada del Campo Health Centre, Community of Madrid Health Service (SERMAS), 28840 Madrid, Spain
5. Computer Science Department, University of Alcala, 28805 Madrid, Spain