@article{doi:, title = {Quickstats: From the national center for health statisticspercentage of hospital outpatient department visits in which a physician assistant or advance practice nurse was seen—national hospital ambulatory medical care survey, united states, 1999—2009}, journal = {JAMA}, volume = {307}, number = {16}, pages = {1688}, year = {2012}, doi = {}, URL = { + http://dx.doi.org/}, eprint = {/data/Journals/JAMA/23307/jwr0425_1688_1688.pdf} }