TY - JOUR AU - Kalmár, P; Irrgang, E TI - Cardiac surgery in Germany during 1997. A report by the German Society for Thoracic and Cardiovascular Surgery JO - Thorac Cardiovasc Surg IS - 5 VL - 46 PY - 1998 DO - 10.1055/s-2007-1010245 SP - 307 EP - 310 ER -