Comparative analysis of muscle quantification by sonography and computed tomography - Kremer, WolfgangMaximilian; Schwarz, Alexander; Kopf, Stephanie; Michel, Maurice; Labenz, Christian; Galle, PeterRobert; Sivanathan, Visvakanth; Sprinzl, MartinFrnaz (Zeitschrift für Gastroenterologie, 2022)