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. 2023 Mar 23;18(3):e0283459. doi: 10.1371/journal.pone.0283459

Fig 1. Flowchart of study population, showing (A) cohorts and (B) further details of the systematic screening cohort.

Fig 1

1D-dimer cut-off ≥ 500 ug/L if ≥ 1 YEARS items; D-dimer cut-off is increased to 1000 ug/L if 0 YEARS items. ED, emergency department; CTPA; computed tomography pulmonary angiogram; PE, pulmonary embolism.