Kongsayreepong S, Janyong P. Platypnea and orthodeoxia syndrome due to a right-to-left shunt via the foramen ovale in the absence of pulmonary hypertension after orthotopic liver transplantation: Sequelae leading to brain abscess: A case report: Reopening foramen ovale in the absence of pulmonary hypertension causes POS and brain abscess after orthotopic liver transplantation. Clin Crit Care [internet]. 2025 Jul. 23 [cited 2026 Sep. 21];33(1):e250017. available from: https://he02.tci-thaijo.org/index.php/ccc/article/view/273699