1. Unidade de Endocrinologia Pediátrica, Hospital Pediátrico Integrado, Centro Hospitalar S. João, Faculty of Medicine, University of Porto, 4200 Porto, Portugal
2. REQUIMTE/LAQV-GRAQ, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, 4200-072 Porto, Portugal
3. Department of Biochemistry, Faculty of Medicine, University of Porto, Centro de Investigação Médica, 4200-450 Porto, Portugal
4. Center for Research in Health Technologies and Information Systems (CINTESIS), 4200-450 Porto, Portugal