The natural history of COVID-19 in vaccinated inflammatory bowel disease patients von Viazis, N., Drygiannakis, I., Karmiris, K., Theodoropoulou, A., Zampeli, E., Tzouvala, M., Bamias, G., Liatsos, C., Theocharis, G., Vrakas, S., Tsironi, E., Mathou, N., Mantaka, A., Christidou, A., Koustenis, K., Veretanos, Ch, Papathanasiou, E., Zacharopoulou, E., Tribonias, G., Kitsou, V., Kartsoli, S., Theodoulou, A., Michopoulos, S., Thomopoulos, K., Koutroubakis, I.E., Mantzaris, G.J.

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Efficacy of switching from infliximab to golimumab in patients with ulcerative colitis in deep remission von Viazis, N., Pontas, C., Manolakis, A., Karampekos, G., Tsoukali, E., Galanopoulos, M., Koustenis, K., Archavlis, E., Christidou, A., Gazouli, M., Mantzaris, G. J.

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The dynamic relationship between antibiotic use and the incidence of vancomycin-resistant Enterococcus: time-series modelling of 7-year surveillance data in a tertiary-care hospita... von Kritsotakis, E.I., Christidou, A., Roumbelaki, M., Tselentis, Y., Gikas, A.

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Long‐term therapy with adefovir dipivoxil in hepatitis B e antigen‐negative patients developing resistance to lamivudine von MANOLAKOPOULOS, S., BETHANIS, S., KOUTSOUNAS, S., GOULIS, J., VLACHOGIANNAKOS, J., CHRISTIAS, E., SAVERIADIS, A., PAVLIDIS, C., TRIANTOS, C., CHRISTIDOU, A., PAPATHEODORIDIS, G., KARAMANOLIS, D., TZOURMAKLIOTIS, D.

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Validation of the dorsal air pouch model to predict and examine immunostimulatory responses in the gut von Kourelis, A, Zinonos, I, Kakagianni, M, Christidou, A, Christoglou, N, Yiannaki, E, Testa, T, Kotzamanidis, C, Litopoulou-Tzanetaki, E, Tzanetakis, N, Yiangou, M

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A Prospective Randomized Controlled Trial of Intravenous Ciprofloxacin as an Adjunct to Corticosteroids in Acute, Severe Ulcerative Colitis von Mantzaris, G. J., Petraki, K., Archavlis, E., Amberiadis, P., Kourtessas, D., Christidou, A., Triantafyllou, G.

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I-CARE, a European Prospective Cohort Study Assessing Safety and Effectiveness of Biologics in Inflammatory Bowel Disease von Abitbol, Vered, Armuzzi, Alessandro, Magro, Fernando, Mantzaris, Gerassimos, Theodoropoulou, Angeliki, Gilletta, Cyrielle, Nakad, Antoine, Michiels, Christophe, Altwegg, Romain, biron, Szepes, Zoltán, Fung, Michael, Thompson, Nick, Alric, Laurent, Samuel, Sunil, Theocharis, Georgios, Sivaji, Ganesh, Bellanger, Christophe, Belle, Arthur, Gisbert, Javier P., Minguez, Miguel, Boivineau, Lucille, Cole, Andy, Gomollon, Fernando, Nos, Pilar, Tennenbaum, Ruth, Domenech, Eugeni, Landman, Cécilia, Lavagna, Alessandro, Caillo, Ludovic, Caron, Bénédicte, Muls, Vinciane, Sicilia, Beatriz, Zabana, Yamile, Cravo, Portugal Marília, Kestenbaum, Samantha, Macken, Elisabeth, Soares, Marta, Bergemalm, Daniel, Kourikou, Anastasia, Ricart, Elena, Ramakrishnan, Subramaniam, de Caestecker, John, Echarri, Ana, Wells, Christopher, Mcnamara, Deirdre, Boysen, Trine, Delattre, Charlotte, Krüger, Rolf-Achim, Caprioli, Flavio, Blixt, Thomas, Khorrami, Sam, Cuillerier, Emmanuel, Danion, Pauline, Müller-Ziehm, Jens, Smith, Mark, Painchart, Claire, Chagas, Cristina, Wilson, Ana, Pica, Roberta, Arab, Nadia, Fellermann, Laus, Bezzio, Cristina, Wampach, Anne, Bailey, Yvonne, Beck, Natasha, Bowlas, Louise, Bradley-Potts, Joanne, Callaghan, Muriel, Carnio, Cornelia, Clack, Concetta Casali, Crowder, Amanda, de Haan, Jose, Delommez, Aude, Dymond, Harvey, Ekblad, Charlotte, Francois, Caroline, Fuge, Nicole, Gettkowski, Raimonda, Godden, Jo, Hammonds, Fiona, Holland, Maureen, Howard, Linda, Karezos, Theofilos, Kelly, Jessica, Manley, Orla, Marra, Antonella, Murciano, M. Francisca, Orbach-Zingboim, Noam, Patch, Sarah, Peggy, Falgon, Pritchard, Lucy, Reilly, Mykla, Reynolds, Rob, Schauer, Anja, Unruh, Olesya, Vandenbroucke, Louise, Wauthier, Marie-Claire, Weetman, Belgium Maria, Jerber, Laure

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459 FREQUENCY AND PREDICTORS OF NO TREATMENT IN ANTI-HCV POSITIVE PATIENTS AT TERTIARY LIVER CENTERS von Papadopoulos, N, Manolakopoulos, S, Deutsch, M, Mela, M, Christidou, A, Katoglou, A, Tzourmakliotis, D, Papatheodoridis, G.V

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Azathioprine is superior to budesonide in achieving and maintaining mucosal healing and histologic remission in steroid‐dependent Crohn's disease von Mantzaris, Gerassimos J., Christidou, Angeliki, Sfakianakis, Michael, Roussos, Anastassios, Koilakou, Stavroula, Petraki, Kalliopi, Polyzou, Paraskevi

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Emergence of vancomycin-resistant enterococci in a tertiary hospital in Crete, Greece: a cluster of cases and prevalence study on intestinal colonisation von Christidou, A., Gikas, A., Scoulica, E., Pediaditis, J., Roumbelaki, M., Georgiladakis, A., Tselentis, Y.

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P429 Mesalazine has no place in the treatment of Crohn’s disease. Really? von Mantzaris MD- PhD- AGAF- FEBG- MACG, G, Archavlis, E, Christidou, A, Viazis, N, Karampekos, G

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P1858 Molecular typing and pathogenic potential of Listeria monocytogenes isolates from food and clinical origin von Papageorgiou, N, Scoulica, E, Panoulis, C, Maraki, S, Christidou, A, Tselentis, Y

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P096 Which patients with known Crohn’s disease after an ileo-colonoscopy will benefit most from small bowel capsule endoscopy? von Viazis, N, Mountaki, A, Koustenis, K, Veretanos, C, Arvanitis, K, Georgiadi, T, Karampekos, G, Manolakis, A, Archavlis, E, Christidou, A, Mela, M, Mantzaris, G

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[729] SERUM LEPTIN CONCENTRATIONS IN CHRONIC VIRAL HEPATITIS: A CLINICAL APPROACH von Manolakopoulos, S, Bethanis, S, Liapi, C, Sklavos, P, Stripeli, F, Margeli, A, Christidou, A, Katsanika, A, Vogiatzakis, E, Tzourmakliotis, D, Theocharis, S

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R2175 Differences in the features of staphylococcal bacteraemias in adults with and without cancer von Kourbeti, I, Papadakas, J, Fanti, G, Kalavrytinou, E, Koutsounaki, E, Rovithi, M, Christidou, A, Samonis, G

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P709 Endoscopic healing and clinical remission after administration of adalimumab to patients with Crohn’s disease of the small intestine von Viazis, N, Koustenis, K, Veretanos, C, Mountaki, A, Almpani, F, Tsatsa, A, Trikola, A, Beka, H, Arvanitis, K, Georgiadi, T, Nousias, G, Mylonas, I, Kozompoli, D, Paparizou, N, Karaouzas, L, Papastergiou, V, Archavlis, E, Mela, M, Christidou, A, Varytimiadis, K, Hatzievangelinou, C, Katopodi, K, Vienna, E, Mantzaris, G

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P343 Maintenance of deep remission in Crohn’s disease after switching from anti–TNF to ustekinumab von Mantzaris, G, Vraka, M, Beka, H, Georgiadi, T, Albani, F, Veretanos, C, Mountaki, K, Trikola, A, Archavlis, E, Christidou, A, Manolakis, A, Viazis, N, Karampekos, G, Philippidis, G, Hatzievangelinou, C, Tsatsa, A, Georgiadou, A, Panagopoulou, S

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P677 Patients with Inflammatory Bowel Diseases on anti-TNF treatment have impaired antibody production after Anti-SARS-CoV-2 vaccination: Results from a Panhellenic registry von Zacharopoulou, E, Orfanoudaki, E, Kitsou, V, Tzouvala, M, Tribonias, G, Mantzaris, G J, Viazis, N, Christidou, A, Almpani, F, Karmiris, K, Theodoropoulou, A, Tsafaridou, M, Michopoulos, S, Zampeli, E, Papathanasiou, E, Michalopoulos, G, Tigkas, S, Karatzas, P, Laoudi, E, Liatsos, C, Kyriakos, N, Mylonas, I, Theocharis, G, Koutroubakis, I E, Bamias, G

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P507 Efficacy of Infliximab after failure of subcutaneous anti-TNF agents in patients with moderate-to-severe ulcerative colitis von Viazis, N, Tsoukali, E, Galanopoulos, M, Pontas, C, Karampekos, G, Filippidis, G, Giouleme, O, Theocharis, G, Tzouvala, M, Archavlis, E, Christidou, A, Mantzaris, G J

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P576 The value of small bowel capsule endoscopy in the change of therapeutic management in patients with established Crohn’s disease von Viazis, N, Tsoukali, E, Pontas, C, Karampekos, G, Gkeros, F, Filippidis, G, Vraka, M, Koustenis, K, Mountaki, K, Mitselos, I, Mela, M, Christidou, A, Archavlis, E, Vienna, E, Christodoulou, D, Mantzaris, G

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