TY - RPRT TI - Real-time, three-dimensional echocardiography: feasibility and initial use. AU - K Sheikh AU - S W Smith AU - O von Ramm AU - J Kisslo PY - 1991 DO - 10.1111/j.1540-8175.1991.tb01409.x UR - https://pubmed.ncbi.nlm.nih.gov/10149247/ ID - 10149247 ER -