Zubkoff L, Lorenz KA, Lanto AB, Sherbourne CD, Goebel JR, Glassman PA, Shugarman LR, Meredith LS, Asch SM. Does Screening for Pain Correspond to High Quality Care for Veterans? Journal of General Internal Medicine. 2010 Mar 14;25(9):900–5. doi: 10.1007/s11606-010-1301-5.