AU  - Hannan EL, O'Donnell JF, Kilburn H, Jr, Bernard HR, Yazici A
TI  - INvestigation of the relationship between volume and mortality for surgical procedures performed in new york state hospitals
PT  - JOUR
DP  - 1989
TA  - JAMA
pages = {503-510},
VI  - 262
IP  - 4
AID  - 10.1001/jama.1989.03430040075029 [doi]
4100  - http://dx.doi.org/10.1001/jama.1989.03430040075029
SO  - JAMA July 28, 1989 262(4):503