World Gastroenterology Organisation Global GuidelinesDouglas R. LaBrecque, Anton LeMair, Muhammed Umar et al.|Journal of Clinical Gastroenterology|2014Cited by 521
World Gastroenterology Organisation Global GuidelinesMuhammed Umar, Peter Ferenci, Tul Bushra Khaar Hamama et al.|Journal of Clinical Gastroenterology|2014Cited by 15