OBES SURG (2017) 27:2279 – 2289 2289 further studies on large series of patients are mandatory to increase our knowledge of endoluminal procedures and to encourage the creation of specific international guidelines. Acknowledgments We thank Francesco Carignani and Manuela Mazzarella of IFSO Secretariat for their support. Compliance with Ethical Standards Conflict of Interest The authors declare that they have no conflicts of interest. Statement of Informed Consent This is a survey in which we do not directly involve human subjects; it is limited to an analysis of bariatric procedures performed around the world. Statement of Human and Animal Rights This is a survey in which we do not directly involve human subjects or animals; it is limited to an analysis of bariatric procedures performed around the world. 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