1. Nursing Department, University of Évora, 7000-801 Évora, Portugal
2. Instituto de Telecomunicações, 3840-193 Aveiro, Portugal
3. Polytechnic Institute of Beja, 7800-295 Beja, Portugal
4. Comprehensive Health Research Centre (CHRC), University of Évora, 7000-801 Évora, Portugal