Freund Y， Chauvin A， Jimenez S， et al. Effect of a diagnostic strategy using an elevated and age-adjusted D-dimer threshold on thromboembolic events in emergency department patients with suspected pulmonary embolism： a randomized clinical trial［J］. JAMA， 2021， 326（21）： 2141.
), 熊若彤1, 孙文平2(
