Is the impact of hospital and surgeon volumes on the in-hospital mortality rate for coronary artery bypass graft surgery limited to patients at high risk?
1997 ◽
Vol 337
(22)
◽
pp. 1569-1575
◽
2002 ◽
Vol 94
(2)
◽
pp. 290-295
◽
2010 ◽
Vol 24
(4)
◽
pp. 574-579
◽
2010 ◽
Vol 12
(1)
◽
pp. 36-45
◽