Humans / Weight Loss / Female / Male / Follow-up studies / Body Mass Index / Gastric banding / Obesity Surgery / Clinical Sciences / Aged / Middle Aged / Fatty Liver / Adult / Public health systems and services research / Time Factors / Morbid Obesity / Laparoscopy / Bandages / Surgical Treatment / Body Mass Index / Gastric banding / Obesity Surgery / Clinical Sciences / Aged / Middle Aged / Fatty Liver / Adult / Public health systems and services research / Time Factors / Morbid Obesity / Laparoscopy / Bandages / Surgical Treatment