A Study of How the Medicine Called "Etrasimod" Works in Children With the Gut Disease Called Ulcerative Colitis

Sheba Medical Center, Ramat Gan, Central District, Israel

Yitzhak Shamir Medical Center, Ẕerifin, Central District, Israel

Shaare Zedek Medical Center, Jerusalem, Jerusalem, Israel

Hadassah Medical Center, Jerusalem, Jerusalem, Israel

Rambam Health Care Campus, Haifa, Northern District, Israel

Health Sciences Centre Winnipeg, Winnipeg, Manitoba, Canada

Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada

CHU de Québec - Université Laval, Québec, Quebec, Canada

Hospices Civils de Lyon - Hôpital Femme Mère Enfant, Bron, Auvergne-Rhône-Alpes, France

Hôpital Universitaire Necker Enfants Malades, Paris, France

Universitätsklinikum Münster - Albert Schweitzer Campus, Münster, North Rhine-Westphalia, Germany

Universitätsklinikum Leipzig, Leipzig, Saxony, Germany

Universitaetsklinikum Tuebingen, Tübingen, Germany

HELIOS Klinikum Wuppertal, Wuppertal, Germany

Azienda Ospedaliera Universitaria Meyer IRCCS, Florence, Tuscany, Italy

Saitama Prefectural Children's Medical Center, Saitama-shi, Saitama, Japan

Japanese Red Cross Kumamoto Hospital, Kumamoto, Japan

Juntendo University Hospital, Tokyo, Japan

Centrum Zdrowia MDM, Warsaw, Masovian Voivodeship, Poland

Medical Network Spółka z o.o. WIP Warsaw IBD Point Profesor Kierkuś, Warsaw, Masovian Voivodeship, Poland

Gyncentrum sp. z o.o. NZOZ Holsamed - oddział Libero, Katowice, Poland

Instytut "Pomnik - Centrum Zdrowia Dziecka", Warsaw, Poland

King's College Hospital, London, London, CITY of, United Kingdom

Evelina London Children's Hospital, London, United Kingdom

Sheffield Children's Hospital, Sheffield, United Kingdom