@article{doi:10.1001/jama.1989.03430040075029,
author = {Hannan EL and O'Donnell JF and Kilburn H and Jr and Bernard HR and Yazici A},
title = {INvestigation of the relationship between volume and mortality for surgical procedures performed in new york state hospitals},
journal = {JAMA},
volume = {262},
number = {4},
pages = {503-510},
year = {1989},
doi = {10.1001/jama.1989.03430040075029},
URL = { + http://dx.doi.org/10.1001/jama.1989.03430040075029},
eprint = {/data/Journals/JAMA/9177/jama_262_4_029.pdf}
}