Adjustable totally implantable intragastric porsthesis (ATIIP)- Endogast® for treatment of morbid obesity: one-year follow-up of a multicenter prospective clinical survey - Gaggiotti, Giorgio; Tack, Jan; Garrido Júnior, Arthur Belarmino; Palau, Miquel; Cappelluti, Giovanni; Di Matteo, Fabio (Obesity Surgery, 2007)