[1] St Louis Univ, Bethesda Hosp, St Louis, MO 63103 USA
[2] N Shore Univ Hosp, Manhasset, NY 11030 USA
[3] Georgetown Univ, Fairfax, VA USA
[4] Atlanta Gastroenterol Associates, Atlanta, GA USA
[5] Univ Miami, Sch Med, Miami, FL USA
[6] A Jacobi Med Ctr, Bronx, NY USA
[7] Roche Labs Inc, Nutley, NJ USA