Fig. 1.
(A) Orbera (http://apolloendo.com), (B) ReShape Duo [16], (C) Obalon (http://www.obalon.com), (D) Spatz3 [17], (E) Elipse [25], (F) Heliosphere BAG [20], (G) End-ball (http://www.endalis.com).
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