Schmid F X, Wippermann F, Kampmann C, Hilker M, Oelert H
Departments of Cardiothoracic Surgery and Pediatric Cardiology, Johannes Gutenberg-University Hospitals, Mainz, Germany.
J Thorac Cardiovasc Surg. 1999 Jan;117(1):188-90. doi: 10.1016/s0022-5223(99)70486-1.