1. Department of Anesthesiology, Unidade Local de Saúde São João
2. UnIC@RISE
3. Department of Surgery and Physiology, Faculty of Medicine of the University of Porto
4. PerMed Research Group, Center for Health Technology and Services Research
5. CINTESIS@RISE, Faculty of Medicine
6. Department of Community Medicine, Health Information and Decision, Faculty of Medicine, University of Porto, Porto, Portugal