[1] Thomas Jefferson Univ Hosp, 111 S 11th St, Philadelphia, PA 19107 USA
[2] Eastern Carolina Univ, Dept Surg, Greenville, NC USA
[3] SUNY Stony Brook, Dept Family Populat & Prevent Med, Med Ctr, Stony Brook, NY 11794 USA
[4] SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA
[5] SUNY Stony Brook, Dept Surg, Div Bariatr Foregut & Adv Gastrointestinal Surg, Med Ctr, Stony Brook, NY 11794 USA