Where There is No Echocardiography: an Overview of the Diagnosis of Paediatric Heart Diseases in a New Paediatric Cardiology Unit at the University of Port Harcourt Teaching Hospital. NIGERIAN JOURNAL OF PAEDIATRICS, [S. l.], v. 34, n. 1&2, p. 36–42, 2024. Disponível em: https://www.njpaediatrics.com/index.php/njp/article/view/573.. Acesso em: 4 apr. 2025.