The Utility of Follow-up Transthoracic Echocardiogram to Screen for Severe Portopulmonary Hypertension (POPH) in Patients Granted POPH Model for End-stage Liver Disease (MELD) Exceptions. - Del Valle KT; Kay D; Krowka MJ; Runo JR; Sadd C; Heimbach JK; Cartin-Ceba R; Cajigas HR; Burger CD; Moss JE; DuBrock HM (Transplantation direct, 2025)