[1] Klinikum Johann Wolfgang Goethe Univ, Frankfurt, Germany
[2] Univ New Mexico, Albuquerque, NM 87131 USA
[3] St Louis Univ Med Ctr, St Louis, MN USA
[4] Univ Utah, Salt Lake City, UT USA
[5] Mayo Clin Rochester, Rochester, MN USA
[6] Clin Quiron Valencia Patol Digest, Valencia, Spain
[7] Hosp Univ Vall dHebron, Barcelona, Spain
[8] Univ Colorado Denver & Hosp, Aurora, CO USA
[9] Univ Texas Hlth Sci Ctr Houston, Houston, TX USA
[10] AKH Wien Univ Kliniken, Vienna, Austria
[11] Uniwersytetu Medycznego Bialymstoku, Bialystok, Poland
[12] Westmead Hosp, Westmead, NSW 2145, Australia
[13] Univ Sydney, Westmead, NSW 2145, Australia
[14] N Texas Res Inst, Arlington, TX USA
[15] Atlanta Gastroenterol Associates, Atlanta, GA USA
[16] Przychodnia Przy Ul Lowieckiej, Wroclaw, Poland
[17] Henry Ford Hosp, Detroit, MI 48202 USA
[18] Toronto Digest Dis Associates Inc, Vaughan, ON, Canada
[19] SCTI Res Fdn, Coronado, CA USA
[20] Weill Cornell Med Coll, New York, NY USA
[21] Miami VA Med Ctr, Miami, FL USA
[22] Virginia Mason Med Ctr, Seattle, WA 98101 USA
[23] Alamo Med Res, San Antonio, TX USA
[24] Univ Calgary, Calgary, AB, Canada
[25] Royal Brisbane & Womans Hosp, Herston, Qld, Australia
[26] Univ Klinikum Hamburg Eppendorf, Hamburg, Germany
[27] Univ Florida, Coll Med, Gainesville, FL USA
[28] Scripps Hlth DBA Scripps Clin Res Serv, La Jolla, CA USA
[29] Fdn Invest Diego, San Juan, PR USA
[30] Metropolitan Res, Fairfax, VA USA
[31] Hosp St Antoine, Paris, France
[32] Toronto Gen Hosp, Toronto, ON, Canada
[33] Bon Secours Mary Immaculate Hosp, Newport News, VA USA
[34] Hosp Mar Barcelona, Barcelona, Spain
[35] JHU Rockland Phys Practice & Res Grp, Lutherville Timonium, MD USA
[36] Mayo Clin Arizona, Phoenix, AZ USA
[37] Baylor Coll Med, Adv Liver Therapies St Lukes Episcopal Hosp, Houston, TX 77030 USA
[38] VAMC Baylor Coll Med, Houston, TX USA
[39] ZymoGenet BMS, Seattle, WA USA
[40] Bristol Myers Squibb Co, Wallingford, CT 06492 USA
[41] Duke Univ, Med Ctr, Durham, NC USA