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. Niger J Paediatr [Internet]. 2024 Jul. 2 [cited 2024 Nov. 18];34(1&2):36-42. Available from: https://www.njpaediatrics.com/index.php/njp/article/view/573