[1] Univ Calif Irvine, Dept Surg, Sch Med, Irvine, CA 92717 USA
[2] Baylor Univ, Med Ctr, Dept Surg, Dallas, TX 75246 USA
[3] McGill Univ, Dept Anesthesiol, Montreal, PQ, Canada
[4] Harvard Med Sch, Massachusetts Gen Hosp, Dept Surg, Boston, MA USA
[5] Cleveland Clin Florida, Dept Colorectal Surg, Weston, FL USA
[6] McGill Univ, Dept Surg, Montreal, PQ, Canada
[7] Norwalk Hosp, Western Connecticut Med Grp, Norwalk, CT USA
[8] Cleveland Clin, Dept Colorectal Surg, Cleveland, OH 44106 USA
[9] McGill Univ, Ctr Hlth, L9-309, Montreal, PQ H3G 1A4, Canada