%0 Journal Article %B JAMA %D 2019 %G eng %N 5 %P 449-450 %R 10.1001/jama.2018.22216 %T Assessing the Performance of Aging Surgeons. %V 321 %1 https://www.ncbi.nlm.nih.gov/pubmed/30640368 %8 02/2019