1. Instituto de Telecomunicações, Universidade of Beira Interior, Covilhã, Portugal
2. Altranportugal, Lisbon, Portugal
3. Assisted Living Computing and Telecommunications Laboratory (ALLab), Computer Science Department, Universidade of Beira Interior, Covilhã, Portugal
4. ECATI, Universidade Lusófona de Humanidades e Tecnologias, Lisbon, Portugal
5. Department of Computer Technology, Universidad de Alicante, Alicante, Spain
6. Department of Computer Science and Artificial Intelligence, CITIC-UGR, University of Granada, Granada, Spain