1. School of Health Sciences (ESSUA) , University of Aveiro, Campus Universitário de Santiago, Aveiro , Portugal
2. Center for Health Technology and Services Research (CINTESIS) , Piso 2, Edifício nascente, Porto , Portugal
3. CINTESIS@RISE, School of Health Sciences, University of Aveiro , Aveiro , Portugal
4. Center for Research and Development in Mathematics and Applications (CIDMA) , Department of Mathematics (DMAT), University of Aveiro, Aveiro , Portugal