1. School of Medicine Universidad del Zulia Maracaibo Venezuela
2. School of Medicine Universidad de los Andes Mérida Venezuela
3. Department of Surgery Houston Methodist Hospital Houston Texas USA
4. Department of Neurology Boston Medical Center Boston Massachusetts USA
5. School of Medicine Universidad Francisco de Miranda Coro Venezuela
6. Helen McArdle Nursing and Care Research Institute Sunderland UK
7. Department of Surgery University of Sunderland Sunderland UK
8. Research Institute for Future Health, Gold Coast, Queensland Australia; Bond University Nutrition and Dietetics Research Group, Bond University, Gold Coast, Queensland, Australia; and Centre for Health Services Research The University of Queensland Brisbane Queensland Australia
9. Centre Hospitalier Universitaire d'Orléans Loire France
10. Nacogdoches Center for Metabolic & Weight Loss Surgery Nacogdoches Texas USA
11. Department of Surgery University of Houston Tilman J. Fertitta Family College of Medicine Houston Texas USA
12. Department of Surgery Sam Houston State University College of Osteopathic Medicine Conroe Texas USA