@article{doi:10.1001/jama.2012.7615,
author = {Landon BE and Keating NL and Barnett ML and et al},
title = {VAriation in patient-sharing networks of physicians across the united states},
journal = {JAMA},
volume = {308},
number = {3},
pages = {265-273},
year = {2012},
doi = {10.1001/jama.2012.7615},
URL = { + http://dx.doi.org/10.1001/jama.2012.7615},
eprint = {/data/Journals/JAMA/24475/joc120041_265_273.pdf}
}