1. CIDES/CINTESIS, Health Information and Decision Sciences Department, Faculty of Medicine; University of Porto; Porto Portugal
2. Internal Medicine Department; Centro Hospitalar de Vila Nova de Gaia/Espinho EPE; Vila Nova de Gaia Portugal
3. Diabetic Foot Clinic, Endocrinology, Diabetes and Metabolism Department; Centro Hospitalar de Vila Nova de Gaia/Espinho EPE; Vila Nova de Gaia Portugal
4. Department of Biochemistry, Faculty of Medicine; University of Porto; Porto Portugal
5. Centre for Evidence-Based Medicine, Faculty of Medicine; University of Lisbon; Lisbon Portugal
6. Portuguese Collaborating Center of the Iberoamerican Cochrane Network; Lisbon Portugal