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D049088:Bariatrics / Q000592:standards*; D005602:France / Q000453:epidemiology; D019983:Guideline Adherence; D006801:Humans; D009767:Obesity, Morbid / Q000601:surgery*; D011183:Postoperative Complications / Q000453:epidemiology; D017410:Practice Guidelines as Topic; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data; D011795:Surveys and Questionnaires