[1] GI Dynam Inc, Lexington 02421, MA USA
[2] Gastro Obeso Ctr, Sao Paulo, Brazil
[3] Pontificia Univ Catolica Chile, Hosp Univ Catolica, Santiago, Chile
[4] Hosp DIPRECA, Ctr Cirugia Obesidad, Santiago, Chile
[5] Univ Hosp, Maastricht, Netherlands
[6] Ziekenluis Rijnstate, Arnhem, Netherlands
[7] Dartmouth Hitchcock Med Ctr, Lebanon, NH 03766 USA
[8] Lahey Clin Med Ctr, Burlington, MA 01803 USA
[9] Carolinas Med Ctr, Charlotte, NC 28203 USA
[10] Massachusetts Gen Hosp, Boston, MA 02114 USA