Contrast-enhanced Ultrasound and the Lerner Histopathological Grade in Gastrointestinal Graft-versus-host Disease: A Prospective Single-centre Study. - Lipan LE; Iordan I; Ioanitescu S; Marcoci A; David A; Tanase AD (Romanian journal of internal medicine = Revue roumaine de medecine interne, 2026)