1. Research Unit of Plastic Surgery, Odense University Hospital, Denmark
2. Clinical Institute, University of Southern Denmark, Odense Denmark
3. OPEN, Odense Explorative Patient Network, Odense, Denmark
4. Department of Surgery, OLVG West Hospital, Amsterdam, Netherlands
5. Department of Surgery. Brigham and Women’s Hospital, Harvard University, Boston, Massachusetts, United States
6. OPEN – Odense Patient data Explorative Network, Odense, University Hospital and University of Southern Denmark, Odense, Denmark
7. Brigham and Women’s Hospital, Harvard University, Boston, Massachusetts, United States
8. Department of Surgery OLVG West Hospital & Dutch Obesity Clinic (NOK), Amsterdam, the Netherlands
9. Catharina Hospital Eindhoven, Eindhoven, Netherlands
10. Department of Plastic and Reconstructive Surgery, St. Antonius Hospital, Nieuwegein, the Netherlands
11. Department of Plastic and Reconstructive Surgery, University Medical Center Utrecht, Utrecht and St. Antonius Hospital, Nieuwegein, the Netherlands
12. Tampere University Hospital and University of Tampere, Tampere, Finland
13. Private Plastic Surgery Clinic, Bytom, Poland
14. Department of Plastic Surgery, Johanniter-Krankenhaus und Waldkrankenahaus Bonn, Germany
15. Fondazione Policlinico Universitario Campus Bio-Medico, Research Unit of Plastic, Reconstructive and Aesthetic Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Roma, Italy
16. Department of Oncologic and Reconstructive Surgery, Maria Sklodowska-Curie Memorial National Cancer Center, Gliwice, Poland
17. Department of Plastic and Breast Surgery, Zealand University Hospital, Roskilde, Denmark
18. Department of Clinical Science in Malmö, Lund University, Sweden
19. University Hospital of Southwest Jutland, Institute for Regional Health Research, University of Southern Denmark and Steno Diabetes Center Odense, Denmark
20. Department of Endocrinology, Hospital of Southwest Jutland, Esbjerg, Denmark
21. Printzlau Privathospital, Virum, Denmark
22. Center for Eating Disorders, Odense University Hospital, Denmark. Research Unit for Medical Endocrinology, Odense University Hospital, Denmark
23. Mental Health Services in the Region of Southern Denmark, Odense. Denmark
24. Department of Pediatrics, McMaster University, Hamilton, Ontario, Canada