1 Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy.
2 Internal Medicine Unit - Obesity Center, University Hospital Policlinico Tor Vergata, Rome, Italy.
3 Department of Nutrition and Dietetics, Faculty of Health Sciences, Beirut Arab University, Beirut, Lebanon.
4 Center for the Study and the Integrated Treatment of Obesity, Internal Medicine 3, Padua University Hospital, Padua, Italy.
5 Faculty of Medicine, School of Translational Health Science, Bristol Medical School, University of Bristol, Southmead Hospital, Bristol, United Kingdom.