[1] Moscow Healthcare Dept, AS Loginov Moscow Clin Sci Pract Ctr, Moscow, Russia
[2] Gastrocenter, Perm, Russia
[3] SM Clin, St Petersburg, Russia
[4] South Ural State Med Univ, Minist Hlth Russia, Chelyabinsk, Russia
[5] Far Eastern State Med Univ, Minist Hlth Russia, Khabarovsk, Russia
[6] First Clin Med Ctr, Kovrov, Russia
[7] Kazan State Med Univ, Minist Hlth Russia, Kazan, Russia
[8] Novosibirsk State Med Univ, Minist Hlth Russia, Novosibirsk, Russia
[9] Omsk State Med Univ, Minist Hlth Russia, Omsk, Russia
[10] Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Separat Div Sci Res Inst Med Problems North, Krasnoyarsk, Russia
[11] Dept Presidential Affairs Russian Federat, Polyclin 3, Moscow, Russia
[12] II Michnikov North Western State Med Univ, Minist Hlth Russia, St Petersburg, Russia
[13] Smolensk State Med Univ, Minist Hlth Russia, Smolensk, Russia
[14] IN Ulyanov Chuvash Republ Chuvash State Univ, Minist Hlth, Republican Clin Hosp, Republican Gastroenterol Ctr, Cheboksary, Russia
[15] Kemerovo State Med Univ, Minist Hlth Russia, Kemerovo, Russia
[16] AI Evdokimov Moscow State Med Dent Univ, Minist Hlth Russia, Moscow, Russia
[17] Pavlov First St Petersburg State Med Univ, Minist Hlth Russia, St Petersburg, Russia
[18] IP Pavlov Ryazan State Med Univ, Minist Hlth Russia, Ryazan, Russia
[19] Tver State Med Univ, Minist Hlth Russia, Tver, Russia
[20] Saratov State Med Univ VI Razumovsky, Minist Hlth Russia, Saratov, Russia
[21] St Petersburg State Univ, St Petersburg, Russia
[22] Kazan Volga Reg Fed Univ, Kazan, Russia
[23] Hosp Pellegrin, Lab Bacteriol, Bordeaux, France
[24] Trinity Coll Dublin, Dept Gastroenterol, Tallaght Hosp, Dublin, Ireland
[25] Univ Hosp Princess, Inst Res Hlth Princess IIS IP, Biomed Res Ctr Network Hepat & Digest Dis CIBEReh, Gastroenterol Unit, Madrid, Spain
[26] Autonomous Univ Madrid UAM, Madrid, Spain