Pediatric Left Ventricular Volumetry Using Real-time Three-dimensional Echocardiography: Validation and Multicenter Reference Values Based on High Sample Size - Glezou, S.; Herberg, U.; Körperich, H.; Barth, P.; Burchert, W.; Kececioglu, D.; Dalla, R. Pozza; Laser, K.T. (The Thoracic and Cardiovascular Surgeon, 2018)